Find your filament in the chart
Each row is one maker’s setting for one of its own products, as printed on its data sheet or help page. The values differ more than you might expect: Prusa dries PLA at 45 °C, while Bambu Lab and Polymaker give 55 °C for theirs. Use the row for your brand when there is one. For another brand, its data sheet is the place to look before you choose a row here.
Signs that a spool needs drying
Wet filament shows up first on the surface of a print, which turns rough. Layers bond less well, blobs appear, and the strand can bubble, smoke, pop or sizzle as the water in it boils at the nozzle. Prints also get stringier, because the steam makes the flow uneven.
Do you need a filament dryer?
If your prints show the signs above, the spool needs drying, and a kitchen oven is a poor tool for it. Bambu Lab’s TPU sheet asks for an oven that spreads its heat evenly, such as a blast drying oven with forced air, and for the filament to sit away from the heater. It rules out kitchen and microwave ovens. Prusa notes that a kitchen oven may not go low enough, and suggests a separate thermometer for anyone who uses one.
Mind the spool
The spool has a temperature limit of its own. Bambu Lab rates its standard ABS spools to 70 °C, and ships its PAHT-CF nylon, which it dries at 80 °C, on a spool of PC and ABS rated to 90 °C. Prusa’s older black spool should stay at 45 °C or less.
What our AMS shows
The tags on Bambu Lab’s matte spools carry a drying setting of their own: 55 °C for 8 hours for PLA Matte, and 65 °C for 8 hours for PETG Matte. We dry PLA in our AMS 2 Pro at 45 °C for 2 hours. Over two days in November 2026, the humidity it reported stayed between 23% and 52%.
Keep it dry afterwards
After drying, store the spool in a sealed box or bag with desiccant. Bambu Lab’s sheet for PLA Basic sets the target at less than 20% relative humidity, for printing and for storage.