Personally for me, very seldom.
Many just squirt a little brake cleaner or gun scrubber in the little clean out hole to clean the striker channel. I don't even do that.
Maybe once a year or even two I might pull the back plate off and check the striker channel and extractor assembly.
This on a PM45. My K9 and K40 probably even less.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."