Why Kerala Is Hard on Filament
Most filaments are hygroscopic, which is a fancy way of saying they soak up water from the air. In a dry climate that is a slow problem. In Kerala, where humidity sits high for most of the year and stays there all through the monsoon, it is the number one reason prints go wrong.
Not all filaments suffer equally. Nylon, PVA and TPU are the thirstiest, PETG is close behind, and PLA and ABS take longer to go bad. But leave any spool out for a few weeks of monsoon and you will see the difference.
Is Your Filament Wet?
You do not need a gadget to find out. Wet filament tells you:
- Popping, crackling or hissing from the nozzle
- Wispy strings and blobs, even after tuning retraction
- A rough, fuzzy or bubbly surface
- Weak, brittle parts that snap along the layers
- Steam visible at the nozzle (that one is unmistakable)
Print a small test cube with a fresh spool and one that has been sitting out. If the old one strings, pops or looks rough, dry it before you blame the printer settings.
How to Dry It
A dedicated filament dryer is the easiest route, and worth it if you print often in Kerala. A food dehydrator with a proper temperature control also works well. Aim for these ballparks, and always check the label on your spool first:
- PLA: about 45–50°C for 4–6 hours
- PETG: about 60–65°C for 4–6 hours
- TPU: about 50–55°C for 4–6 hours
- ABS / ASA: about 65–70°C for 4–6 hours
- Nylon (PA): about 70–80°C for 8–12 hours
Going too hot softens the spool and can warp it, especially PLA. A deformed spool feeds badly and can jam mid-print. Stay at or below the temperature on the label.
How to Store It
Drying fixes the problem. Storage prevents it. The simple setup that works:
- Keep every spool in an airtight box or a zip bag with a desiccant sachet.
- Use indicator silica gel (it changes colour when saturated) and recharge it as the pack instructs.
- Put a small hygrometer in the box. Under 20% humidity is the target for fussy materials like nylon and TPU.
- Reseal the box every time you take a spool out.
For nylon, TPU and PETG, print straight from a dry box if you can. A spool on the printer for a monsoon week is a wet spool by Friday.
Our Monsoon Routine
1. New spool goes into a dry box the day it arrives. 2. Only the spool you are printing sits outside. 3. Anything that has been out for more than a few days gets dried before printing. 4. Replace or recharge the desiccant on a schedule, not when you remember.
These habits cost very little and save a lot of failed prints, wasted filament and head-scratching over settings that were never the problem.
Quick Answers
Can I just leave PLA out?
For a few days, usually yes. For weeks in monsoon, you will start to see quality drop. A sealed box costs far less than one ruined print.
Is vacuum sealing worth it?
Yes for spare spools you will not touch for a while. For the spool in use, a dry box is more practical.
Wet filament issues are one of the first things we help owners sort out. If you are not sure whether it is moisture or your printer, talk to us.