Powder residue is hygroscopic.
From the DPT instructions:
During shooting condensation is created inside the suppressor, containing amongst others ammonia (mixture of burnt powder and water)....
Type: Posts; User: Moutere
Powder residue is hygroscopic.
From the DPT instructions:
During shooting condensation is created inside the suppressor, containing amongst others ammonia (mixture of burnt powder and water)....
+1 mouse milk penetrating oil.
A hose clamp on the suppressor should help with some extra purchase with which to torque it.
I would say some gentle heat would help, it's not like they don't get hot when used.