A vacuum specialist suggested a better technique for degreasing vacuum equipment:
Lightly swab with acetone, followed by reagent grade ethyl alcohol.
The acetone degreases, and the alcohol removes residual acetone.
I used this cleaning technique before reassembling the Polywell:
Back in the chamber soon!
Prometheus Fusion Perfection 
FYI – you should check to make sure you’re OK with all the additives that are in your particular brand of denatured alcohol.