# Why is my filament brittle and snapping?

Old, wet PLA is the explanation the highest-scored comment gives: it gets brittle, and cheap filament gets worse. Dry it at the temperature on its own row, or reject the spool if it arrived that way. Do not boil it.

Old, wet PLA is the explanation the highest-scored comment gives: it gets brittle, and cheap filament gets worse. Dry it at the temperature on its own row, or reject the spool if it arrived that way. Do not boil it.

A spool that snaps on the way into the extruder is usually old, wet PLA. Dry it at the temperature published for that row, and reject it if it showed up brittle. Boiling it is a joke in the thread, not a process. [Drying](/answers/drying), [storage](/answers/storage), [PLA printing](/answers/pla_print), [filament quality](/answers/filament_quality), and [clogs](/answers/clog) are the pages that carry the detail.

## Dry the row you have

[PLA Basic](/brand/bambu-lab/pla-basic) dries at 50 °C (122 °F) for 8 hours. [Prusament PLA](/brand/prusament/pla) dries at 45 °C (113 °F) for 6 hours. [PolyLite PLA](/brand/polymaker/polylite-pla) dries at 55 °C (131 °F) for 6 hours. The print windows are 190–230 °C (374–446 °F), 205–225 °C (401–437 °F), and 190–230 °C (374–446 °F). Drying temperature is not the nozzle temperature. The [drying dataset](/data/filament-drying) is the table those hours come from. [PLA](/material/pla) is the hub.

[Prusa's PLA article](https://help.prusa3d.com/article/pla_2062) uses "brittle" for the printed part: it breaks along layers or into shards on impact. That stays true after you dry the spool. A dry PLA hook can still snap when you shock it. [Hooks](/answers/functional_hooks) is the load case. [Prusa's drying article](https://help.prusa3d.com/article/drying-filament_332086) is the source URL stored on the Prusament PLA drying fields.

Bambu's filament guide adds a second brittle case: filament that snaps inside an AMS channel, with certain PLA Wood and some fiber nylons on the example list. Dry those at their own rows before you call the AMS defective. [Wood fill](/answers/wood) has the PLA Wood drying line, 55 °C (131 °F) for 8 hours.

## The threads

[r/3Dprinting 1myq0ge](https://www.reddit.com/r/3Dprinting/comments/1myq0ge/) is the brittle-spool thread. The score-560 comment says refuse it if it arrived that way. The score-464 comment says PLA gets very brittle when it is old and moist, and that cheap filament is worse. There is no moisture percentage in the comment.

[r/3Dprinting 1nff6t6](https://www.reddit.com/r/3Dprinting/comments/1nff6t6/) is the photo. The score-8 comment says 8 to 10 minutes in salty boiling water. The score-3 comment says wash the build plate. Skip both. The other three links are glow filament, a snap, and a sound that might be the extruder gear. No excerpt was supplied, so this page does not diagnose them.

Updated 2026-10-19. Sources accessed 2026-10-19. Use case: Drying.

## Ranked filaments

| Rank | Filament | Nozzle | Bed | Price per kg |
| --- | --- | --- | --- | --- |
| 1 | Bambu Lab PLA Basic | 190–230 °C (374–446 °F) | 35–45 °C (95–113 °F) | — |
| 2 | Prusament PLA | 205–225 °C (401–437 °F) | 40–60 °C (104–140 °F) | — |
| 3 | Polymaker Polylite PLA | 190–230 °C (374–446 °F) | 25–60 °C (77–140 °F) | — |

## What the community says

r/3Dprinting 1myq0ge is brittle PLA. The score-560 comment says if it arrived that way, do not accept it. The score-464 comment says old, moist PLA gets very brittle, and that cheap filament is worse. r/3Dprinting 1nff6t6 is a photo of snapped PLA. The score-8 comment says 8 to 10 minutes in salty boiling water. The score-3 comment says wash the build plate. Neither fixes a brittle spool. No excerpt was supplied for r/FixMyPrint wgtl1k, r/FixMyPrint uh9ge7, or r/ender3 123qlw5. The bank titles there are glow filament, a snap in the path, and a snapping sound that might be the gear.

## Sources

- [Bambu PLA Basic technical data sheet](https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_PLA_Basic_Technical_Data_Sheet_bf3411ce-be39-4db7-9669-1b4671d2196b.pdf?v=1734060943) (datasheet)
- [Polymaker PolyLite PLA technical data sheet](https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PLA_TDS_EN_V5.4.pdf) (datasheet)
- [Prusa Knowledge Base, drying filament](https://help.prusa3d.com/article/drying-filament_332086) (manufacturer)
- [Prusa Knowledge Base, PLA](https://help.prusa3d.com/article/pla_2062) (manufacturer)
- [Community source, r/3Dprinting 1nff6t6](https://www.reddit.com/r/3Dprinting/comments/1nff6t6/) (reddit)
- [Community source, r/3Dprinting 1myq0ge](https://www.reddit.com/r/3Dprinting/comments/1myq0ge/) (reddit)
- [Community source, r/FixMyPrint wgtl1k](https://www.reddit.com/r/FixMyPrint/comments/wgtl1k/) (reddit)
- [Community source, r/FixMyPrint uh9ge7](https://www.reddit.com/r/FixMyPrint/comments/uh9ge7/) (reddit)
- [Community source, r/ender3 123qlw5](https://www.reddit.com/r/ender3/comments/123qlw5/) (reddit)

HTML: https://filamentfacts.com/answers/brittle