Is there a chart available with how dry each type of filament should be?
I don’t think how dry each should be is an issue, they all need to be dry. The problem is that some materials are hygroscopic so they absorb moisture from the atmosphere whereas others don’t. Too much moisture in the filament – any filament – results in the moisture boiling off when it gets into the hotend, resulting in an erratic print (and spitting noises).
Personally, I try to store all my filaments at ≤︎20% RH.
Thanks!