Welcome back Bilko,
I have the same pistol , still deiseling after 1 year 😫
How I see it is You do 2 things ,
1 shoot the thing till it stops and then
2 Take it do bits and degrease it .

Yes like Me You don’t want to do that , it may be the only way ,
hopefully someone else turns up with an alternative answer and tells You 👍

Paul