As i have no oven for drying Filament, i try to use the heated Bed.
This is a tryout.

Until now i had no problem with "wet" filament. the first time i recognized some bubbles was with PETG Filament. I thought the temperature was too high, because when i lowered the temperatur the bubbling went away.

First test with Innofill PETG Filament / Prusaslicer Generic PETG Profile
Filament has bubbles with 230/240 degree celsius when i reduce to 215 there are no bubbles.
Drying the filament with 75 degrees heated bed for 4 hours with multiple turnarounds
on mk3s you have to change the security timer M86 S14400 (4hours) else the timer will switch off the heated bed. After the drying you should reset the security timer to its original state with the command or with switching off and on (Printer)

After drying i was able to print this filament with the generic PETG profile without bubbles.