How to Dry 3D Printer Filament: The Complete Guide (2026)
Everything You Need to Know About Drying PLA, PETG, TPU, ASA & More
Have you ever heard popping sounds coming from your nozzle, noticed excessive stringing, or wondered why your prints suddenly look rough even though your settings haven't changed?
There's a good chance your 3D printer filament has absorbed moisture.
Moisture is one of the most common causes of poor print quality, yet it's also one of the easiest problems to prevent. In this guide, we'll explain why filament absorbs moisture, how to recognise the signs, the best drying temperatures for every major filament type, and how to store filament correctly to keep your prints looking their best.
Whether you're printing with PLA, PETG, TPU, ASA or Carbon Fibre PLA, this guide will help you get consistently better results.
Why Does 3D Printer Filament Absorb Moisture?
Many 3D printing materials are hygroscopic, meaning they naturally absorb moisture from the surrounding air.
The amount of moisture absorbed depends on factors such as:
- Humidity
- Storage conditions
- Material type
- How long the spool has been exposed
When wet filament passes through a hot nozzle, the trapped moisture rapidly turns into steam, which can negatively affect print quality.
Signs Your Filament Needs Drying
If your prints suddenly begin to deteriorate, moisture could be the cause.
Common symptoms include:
💧 Popping or crackling sounds during printing
💧 Increased stringing
💧 Rough or uneven surface finish
💧 Poor layer adhesion
💧 Weak or brittle parts
💧 Tiny bubbles or pitting on the surface
If you're experiencing several of these symptoms, drying your filament may restore print quality.
Which Filaments Absorb the Most Moisture?
Not all materials absorb moisture at the same rate.
| Filament | Moisture Sensitivity |
|---|---|
| Nylon | ⭐⭐⭐⭐⭐ Very High |
| TPU | ⭐⭐⭐⭐☆ High |
| PETG | ⭐⭐⭐⭐☆ High |
| ABS | ⭐⭐⭐☆☆ Moderate |
| ASA | ⭐⭐⭐☆☆ Moderate |
| PLA | ⭐⭐☆☆☆ Moderate |
| PLA+ | ⭐⭐☆☆☆ Moderate |
| Carbon Fibre PLA | ⭐⭐⭐☆☆ Moderate |
| Silk PLA | ⭐⭐☆☆☆ Moderate |
| Matte PLA | ⭐⭐☆☆☆ Moderate |
Even PLA can absorb enough moisture over time to affect print quality, especially in humid environments.
Recommended Filament Drying Temperatures
Different materials require different drying temperatures.
| Material | Temperature | Drying Time |
|---|---|---|
| PLA | 40–45°C | 4–6 hours |
| PLA+ | 40–45°C | 4–6 hours |
| Silk PLA | 40–45°C | 4–6 hours |
| Matte PLA | 40–45°C | 4–6 hours |
| PETG | 60–65°C | 4–6 hours |
| TPU | 45–55°C | 4–6 hours |
| ABS | 70–80°C | 2–4 hours |
| ASA | 70–80°C | 2–4 hours |
| Nylon | 70–80°C | 6–12 hours |
| Carbon Fibre PLA | Follow the base polymer guidance (typically similar to PLA, unless otherwise specified by the manufacturer). |
Tip: Always check the filament manufacturer's recommendations, as drying temperatures can vary between brands and formulations.
The Best Ways to Dry 3D Printer Filament
1. Filament Dryer (Recommended)
A dedicated filament dryer is one of the safest and most effective ways to remove moisture.
Benefits include:
✅ Controlled temperature
✅ Consistent drying
✅ Lower risk of overheating
✅ Some models allow printing while drying
For anyone printing regularly, a filament dryer is a worthwhile investment.
2. Food Dehydrator
Many makers successfully use food dehydrators with adjustable temperature controls.
Advantages:
- Even airflow
- Good temperature stability
- Suitable for drying multiple spools (depending on the model)
Ensure the dehydrator is large enough for your spool size and that temperatures match the filament manufacturer's guidance.
3. Can You Use an Oven?
While some people use household ovens, we generally don't recommend it.
Many domestic ovens have temperature fluctuations that can exceed the selected setting. Since some filaments begin to soften at relatively low temperatures, overheating can permanently deform a spool.
If you do choose to use an oven, verify the temperature carefully with an independent thermometer and follow the filament manufacturer's recommended drying temperature.
How to Store Filament Properly
Prevention is better than drying filament repeatedly.
To keep your filament in excellent condition:
✅ Store spools in resealable bags or airtight containers.
✅ Include fresh silica gel or other desiccants.
✅ Avoid leaving filament exposed to humid air for extended periods.
✅ Reseal partially used spools after every print.
Proper storage can greatly reduce moisture-related printing issues.
Does Every Print Need Dry Filament?
Not necessarily.
Fresh, properly sealed filament is often ready to print straight away.
However, if a spool has been open for weeks or months—especially in a humid environment—drying it before a long or important print can improve consistency.
Materials such as PETG, TPU and Nylon generally benefit the most from careful moisture management.
Frequently Asked Questions
Can wet filament damage my printer?
Moist filament is unlikely to damage a well-maintained printer directly, but it can lead to poor print quality, more stringing and failed prints. Severe moisture can also increase the likelihood of clogs with some materials.
How often should I dry filament?
This depends on the material, storage conditions and local humidity.
Many users only dry filament when they notice symptoms such as popping, stringing or rough surfaces. Others routinely dry moisture-sensitive materials before critical prints.
Can I dry filament more than once?
Yes.
Most filaments can be dried multiple times when using appropriate temperatures. Avoid excessive heat that could soften or deform the spool.
Should I dry brand-new filament?
Quality filament is typically vacuum sealed with desiccant and is often ready to print immediately.
However, if a vacuum seal has failed, shipping conditions were humid, or you notice signs of moisture, drying the filament may improve print quality.
Choosing Quality Filament Matters
While drying can solve many moisture-related issues, starting with high-quality filament is just as important.
Filament with consistent diameter, proper winding and careful packaging helps reduce failed prints and improves reliability.
At Filamigo, we stock premium 1.75mm filament that's vacuum sealed with desiccant and carefully selected for consistent performance across a wide range of FDM printers.
Explore our collections:
- PLA Filament: https://www.filamigo.com.au/collections/pla-filament
- PLA+ Filament: https://www.filamigo.com.au/collections/pla-plus-filament
- PETG Filament: https://www.filamigo.com.au/collections/petg-filament
- TPU Filament: https://www.filamigo.com.au/collections/tpu-filament
- ASA Filament: https://www.filamigo.com.au/collections/asa-filament
- Carbon Fibre PLA: https://www.filamigo.com.au/search?q=carbon+fibre
- Matte PLA: https://www.filamigo.com.au/search?q=matte+pla
- Silk PLA: https://www.filamigo.com.au/search?q=silk+pla
- Gradient PLA: https://www.filamigo.com.au/search?q=gradient+pla
You can also browse our full range of premium 3D printing materials at https://www.filamigo.com.au.
Final Thoughts
Moisture is one of the most common causes of inconsistent 3D printing, but it's also one of the easiest problems to fix.
By recognising the warning signs, drying filament at the correct temperature and storing it properly, you'll enjoy stronger parts, cleaner surfaces and more reliable prints.
Whether you're printing simple PLA models or advanced engineering materials, taking care of your filament is one of the easiest ways to improve print quality.
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