Yes, I use them both ....and always clean the screen (an old habit from VW Beetle days)
I just don't get crazy when tightening things back up....only snug the washer, and the 0 ring.
This ain't an Atlas booster.....things can't be under that much pressure in there.
When my kids finally send me to the Home - I'll spend the day measuring how much oil comes, out trying all methods. As long as 100% comes out with the screen - I'll pass that on to every scooter rider on my side of the hall.
Stig