How to dry PETG filament
Dry PETG at 60–70 °C for 4–6 h.That is the consensus range from dryer and filament manufacturers — the exact same values the filament drying chart & timer uses, where you can start a countdown for this cycle. PETG is moderate — PETG picks up moisture steadily, so expect moisture trouble after a few days in a humid room.
60–70 °C
for 4–6 h — PETG drying temperature and time
| Material | PETG |
| Temperature | 60–70 °C |
| Time | 4–6 h |
| Note | — |
Wet PETG symptoms
The symptom PETG shows most characteristically is heavy stringing and oozing that no amount of retraction tuning fixes. Beyond that, the general wet-filament signs apply: popping, crackling or hissing from the nozzle as steam bursts out of the melt, stringing and oozing that retraction tuning cannot fix, a fuzzy or unexpectedly matte surface, and weak parts that snap along layer lines. If a spool that printed fine before storage now shows any of these, dry it before touching a single slicer setting.
Drying notes for PETG
Check the spool before drying — many plastic spools start to soften right around the top of the PETG range. Stay at the lower end, or move the filament to a metal or glass tray if your dryer only runs hot.
PETG re-absorbs moisture within a day or two in humid rooms, so print straight from the dryer or a dry box if you can. When the cycle finishes, print immediately or move the spool into a sealed dry box with desiccant — and if you are unsure how much is left on the spool afterwards, the spool remaining calculator turns a scale reading into grams, meters and percent.
Step by step
- Confirm it is wet — heavy stringing and oozing that no amount of retraction tuning fixes, or popping and stringing after storage. When in doubt, dry anyway; it does no harm.
- Check the spool rating before applying heat.
- Set the dryer to 60–70 °C and run the full 4–6 h.
- Print immediately or store dry — sealed box or bag with fresh desiccant.
Frequently asked questions
What is the PETG drying temperature?
Dry PETG at 60–70 °C for 4–6 h. These are the consensus manufacturer ranges — the same values the MakerCalc drying chart & timer uses.
How long does it take to dry PETG?
Plan for 4–6 h at 60–70 °C. Moisture leaves the core of the wind slowly, so cutting the time short dries only the outer loops — when in doubt, dry longer rather than hotter.
Can I dry PETG on its spool?
Check the spool before drying — many plastic spools start to soften right around the top of the PETG range. Stay at the lower end, or move the filament to a metal or glass tray if your dryer only runs hot.
How do I know if my PETG is wet?
The clearest sign for PETG is heavy stringing and oozing that no amount of retraction tuning fixes. Also listen for popping or hissing from the nozzle and check for weak layer bonds. PETG picks up moisture over a few days in a humid room, so a spool that printed fine last month can print badly today.
Can I dry PETG in a kitchen oven?
It works, but household ovens commonly swing ±10 °C around the set point. Verify the actual temperature with a separate oven thermometer, use the fan setting if available, and never leave it unattended — a filament dryer or food dehydrator with a real thermostat is the safer option.