Short answer

Dry PLA+ filament at 40 to 50 C for 4 to 8 hours in a filament dryer, food dehydrator, or low oven. PLA+ is more tolerant than PETG or nylon, but it still absorbs moisture, and a wet spool pops, strings, and prints rough. The eSUN PLA+ datasheet sets the baseline at 50 C for more than 8 hours.

Why PLA+ needs drying

PLA+ is a tougher PLA blend, and the impact modifiers do not change how it handles water. It absorbs moisture more slowly than PETG or nylon, but a spool left open in a humid room still goes wet. The signs are the same as any filament: popping or hissing at the nozzle, a cloudy or rough surface, and fine strings between travel moves. The eSUN PLA+ datasheet lists a 50 C, 8-plus-hour dry, and SUNLU’s PLA+ sits in the same range.

PLA+ drying methods compared4 methods

Filament dryer

45 to 50 C / 4 to 8 h

The cleanest method; some models let you print from the dryer.

Food dehydrator

45 C / 6 h

Cheap and effective; set it low and check the real temperature.

Oven (low)

40 to 45 C / 4 to 6 h

Use only an oven that holds a true low temp; too hot warps the spool.

Heated bed

50 C / 6 to 8 h

A sealed box on a warm bed works in a pinch for a single spool.

How to dry PLA+

Dry the spool, then store it sealed so you do not repeat the cycle every week. The filament storage guide covers the sealed-bag-and-desiccant half, and the best filament dryer page covers the gear. For the material background, the PLA+ hub explains what makes it tougher, and the general how to dry filament page covers every material.

Frequently asked

What temperature should I dry PLA+ at?
40 to 50 C. The eSUN PLA+ datasheet lists 50 C for more than 8 hours, and SUNLU's PLA+ sits in the same range. Stay below 55 C, where PLA+ begins to soften.
How do I know if my PLA+ is wet?
Wet PLA+ pops or hisses at the nozzle, prints a cloudy or rough surface, and leaves fine strings between moves. A popping sound on the first layer is the clearest sign it needs drying.
Can I dry PLA+ in the oven?
Yes, but only an oven that holds a true low temperature. Set it to 40 to 45 C and verify with a thermometer, since a hot swing can deform the spool. A filament dryer or food dehydrator is safer and more consistent.

Related guides

Related

More in this area

Sources & methodology

3 citations · reviewed 2026-07-09
  1. 01eSUN PLA+ Technical Data Sheet (TDS PDF, drying table)accessed 2026-07-06Tier 1
  2. 02SUNLU PLA+ Technical Data Sheet (TDS PDF)accessed 2026-06-29Tier 1
  3. 03Dry Filament (Bambu Lab Wiki): per-material drying tableaccessed 2026-06-29Tier 1
How we vetted this: every claim traces to a tiered source, Tier 1 (manufacturer, slicer, standards) first. Read the full sourcing and conflict-of-interest policy.