PETG

How do I stop PETG stringing?

Q: How do I stop PETG stringing?

Dry the spool, then tune temperature and retraction inside that spool's listed nozzle range. The highest-scored replies here blame wet PETG, and one reply says they never dry PETG and blame retraction instead.

First in this ranking: Polymaker Polylite PETG.

Nozzle220–250 °C(428–482 °F)
Bed70–90 °C(158–194 °F)
Speed50–100 mm/s
Dry65 °C(149 °F)for 6 hManufacturer drying table →
Density1.25 g/cm³

Speed, Drying. Source: Polymaker TDS · Last checked 18 October 2026

Ranked filaments

Rank	Filament	Nozzle	Bed	Datasheet	Buy
1	Polymaker · Polylite PETG	220–250 °C (428–482 °F)	70–90 °C (158–194 °F)	Datasheet	Amazon ↗
PolyLite PETG technical data sheet. Nozzle 220–250 °C (428–482 °F), bed 70–90 °C (158–194 °F), drying at 65 °C (149 °F) for 6 h. A temperature tower stays inside 220–250 °C (428–482 °F).
2	SUNLU · PETG	240–260 °C (464–500 °F)	60–70 °C (140–158 °F)	—	Amazon ↗
SUNLU product page lists 240–260 °C (464–500 °F) and a bed of 60–70 °C (140–158 °F), checked 19 October 2026. The SUNLU wiki lists drying at 60–65 °C (140–149 °F) for 6–8 h. The commenter's 215 °C (419 °F) eSUN tower is below this nozzle.
3	Bambu Lab · PETG HF	230–260 °C (446–500 °F)	65–75 °C (149–167 °F)	Datasheet	Amazon ↗
PETG HF technical data sheet. Nozzle 230–260 °C (446–500 °F), bed 65–75 °C (149–167 °F), drying at 65 °C (149 °F) for 8 h. r/FixMyPrint 1qgm39r is Bambu PETG Translucent stringing on default 0.20 mm settings. A reply says to dry for eight hours. Eight hours matches this sheet's time. The sheet's temperature is 65 °C (149 °F).
4	Prusament · PETG	240–260 °C (464–500 °F)	70–90 °C (158–194 °F)	Datasheet	Amazon ↗
Prusament PETG technical data sheet lists 240–260 °C (464–500 °F) and a bed of 70–90 °C (158–194 °F). Drying on the row is the Prusa material guide, 55 °C (131 °F) for 6 h. A score-11 reply on r/prusa3d 11ykff2 says 230 °C (446 °F) looks low for Prusament. 230 °C (446 °F) is below this nozzle.
5	eSUN 3D · PETG	220–250 °C (428–482 °F)	70–90 °C (158–194 °F)	—	Amazon ↗
The catalog stores a nozzle of 220–250 °C (428–482 °F) and a bed of 70–90 °C (158–194 °F), and drying at 60 °C (140 °F) for 8 h from the eSUN product page. A score-5 reply on r/prusa3d 11cxj6f found about 215 °C (419 °F) on an eSUN tower, and says white and black of that brand wanted different temperatures. 215 °C (419 °F) is below this nozzle.

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Stringing on PETG starts with the spool. The replies that scored highest say the filament is wet. One reply disagrees and never dries it.

Dry the spool you loaded

r/prusa3d 11cxj6f is a Mini+ first PETG print. The score-30 reply says drying, and nothing else, is what cleaned it up. r/prusa3d 13ckz2q says a fresh bag still strings. The score-17 reply says PETG loves water. r/prusa3d 11ykff2 puts wet filament ahead of temperature and retraction. r/FixMyPrint 1ix5trz says dry first, then tune retraction. A score-4 reply on that thread says they have never dried PETG and that stringing is retraction.

Use the row, not a single drying guess. PolyLite PETG lists 65 °C (149 °F) for 6 h. SUNLU PETG lists 60–65 °C (140–149 °F) for 6–8 h. PETG HF lists 65 °C (149 °F) for 8 h. Prusament PETG uses the Prusa material guide at 55 °C (131 °F) for 6 h. eSUN PETG lists 60 °C (140 °F) for 8 h. The measured drying table is the filament drying dataset. Process for any material is drying. General stringing is stringing. PETG setup is good PETG prints. Ooze on travel is ooze.

Temperatures that showed up in the threads

A score-5 reply on 11cxj6f liked about 215 °C (419 °F) on an eSUN tower and says white and black eSUN wanted different temperatures. eSUN PETG lists 220–250 °C (428–482 °F), so 215 °C (419 °F) is below the row. A score-11 reply on 11ykff2 says 230 °C (446 °F) looks low for Prusament. Prusament PETG lists 240–260 °C (464–500 °F), so 230 °C (446 °F) is below that nozzle. The poster on 13ckz2q is at 230 °C (446 °F) on the first layer and an 85 °C (185 °F) bed with purefil, which is not a catalog brand.

r/FixMyPrint 1qgm39r is Bambu PETG Translucent on a hook. The score-46 reply still expects a few hairs and names a lighter. A reply says eight hours in a dryer. That time matches the PETG HF sheet. The sheet's drying temperature is 65 °C (149 °F). PETG is the material page. Polymaker, SUNLU, and Prusament are the brand indexes.

Pros and cons

Pros

Drying temperatures stay on the product row, including SUNLU's 6–8 h and PolyLite's 6 h.
The 215 °C (419 °F) eSUN result and the 230 °C (446 °F) Prusament comment are labeled as comments that sit outside those listed nozzles.

Cons

A score-4 reply says PETG never strings if retraction is right and that drying is irrelevant. That disagreement stays on the page.
r/prusa3d 13ckz2q uses purefil at 230 °C (446 °F) on the first layer and an 85 °C (185 °F) bed. purefil is not a catalog brand, so those settings are not copied onto a ranked row.

Printer considerations

Dry first, then retraction. That order is the score-13 reply on r/FixMyPrint 1ix5trz. The score-4 reply on the same thread says the opposite and never dries PETG.
A temperature tower is the tool named on r/prusa3d 11cxj6f, r/prusa3d 13ckz2q, and r/FixMyPrint 1qgm39r. Read the tower against the row you loaded.
Hairs that remain after drying are called normal by several replies. They name a lighter or a heat gun as cleanup. This page does not add a retraction distance.

Printer limits

What the community says

r/prusa3d 11cxj6f is a first PETG print on a Mini+ with stringing and pilling. The score-30 reply says drying, with no other change, is what made the prints clean. A score-5 reply ran a temperature tower, liked about 215 °C (419 °F), and says white and black eSUN PETG wanted different temperatures. The same reply still calls the poor surface humidity. r/prusa3d 13ckz2q is first-layer stringing and globs. The poster lists 230 °C (446 °F) on the first layer, an 85 °C (185 °F) bed, and purefil. The score-17 reply says PETG loves water and to dry it, then dial Z again. r/FixMyPrint 1qgm39r is Bambu PETG Translucent stringing on a simple hook. The score-46 reply calls some stringing a fact of life and names a temperature tower, retraction, and a lighter for leftover hairs. A reply says to dry for eight hours. r/prusa3d 11ykff2 is stringing on long prints. The score-26 reply says the main reason is wet filament. A score-11 reply says 230 °C (446 °F) looks low for Prusament and asks whether the nozzle is tight against the heatbreak. r/FixMyPrint 1ix5trz is heavy PETG stringing on an Ender 5 Plus. The score-13 reply says dry first, then tune retraction. A score-4 reply says they never dry PETG and that stringing is a retraction and temperature problem.

Sources & notes

Accessed 20 October 2026.

PolyLite PETG technical data sheet datasheet
SUNLU PETG product page manufacturer
SUNLU filament wiki manufacturer
Bambu PETG HF technical data sheet datasheet
Prusament PETG technical data sheet datasheet
eSUN PETG product page manufacturer
Community source, r/prusa3d 11cxj6f reddit
Community source, r/prusa3d 13ckz2q reddit
Community source, r/FixMyPrint 1qgm39r reddit
Community source, r/prusa3d 11ykff2 reddit
Community source, r/FixMyPrint 1ix5trz reddit

Answer JSON · Markdown

Questions

Is 215 °C (419 °F) a good PETG nozzle?

It is one commenter's eSUN tower result on r/prusa3d 11cxj6f. eSUN PETG in the catalog lists 220–250 °C (428–482 °F), so 215 °C (419 °F) is below that row. Prusament PETG lists 240–260 °C (464–500 °F), and a reply on r/prusa3d 11ykff2 already calls 230 °C (446 °F) low for Prusament.

How long do the ranked spools say to dry?

PolyLite PETG lists 65 °C (149 °F) for 6 h. SUNLU PETG lists 60–65 °C (140–149 °F) for 6–8 h. Bambu PETG HF lists 65 °C (149 °F) for 8 h. Prusament PETG uses the Prusa material guide, 55 °C (131 °F) for 6 h. eSUN PETG lists 60 °C (140 °F) for 8 h on the product page stored here. A comment that says eight hours is not those sheets.