Personally, I clean my firearms after every use, however many do not. If there was one spot in a pistol that would cause a FTF, or other malfunction, where would that occur?
Thanks

Ken

On a striker fired platform, the striker channel is often overlooked and it builds up a lot of carbon that blows back around the firing pin.

Second would be the trigger group, in my opinion.

I typically clean before a big range outing and not after.  That gives me a session post cleaning to ensure I didn't futz something up when I put it back together.

I deep clean when I change recoil springs, usually about 4-5K rounds. That includes a detail strip, ultrasonic dip and ensuring that all carbon and gunk is removed from everywhere.  The only thing I don't remove is the sights.

Most field malfunctions are due to dirty ammo and dirty magazines. When working in dusty conditions I unload my duty mags and clean the mags and the ammo weekly at least.

The extractor and associated mechanism is prone to malfunction with enough dirt build-up. Also the chamber...doesn't take much interference to bugger the works. On a big USPSA shoot I'll run a bore snake through my barrel a few times between sessions, especially if shooting lead.

On a Glock I clean everything you can reach with a simple strip after each session, and I remove the firing pin and extractor mechanism every thousand-ish rounds. I really only remove the trigger group if I'm changing springs or if something unusual happens to pack it with dirt. Honestly I could probably just clean a Glock every 5,000 rounds and be fine, but that's not how I was raised.

Some of my friends who shoot high-end target guns can barely make it through a match without their guns starting to malfunction due to build-up unless they clean between stages. I personally wouldn't tolerate a gun that refined...especially not for the price of six new Glocks.

I do clean after every usage and field strip and do a good inspection. 
I lot of times I work with conversion barrels and may not use my carry gun factory barrel at times, because I maybe using cast bullets in the other barrels.

Thanks guys!

Quote from: Muskrat on July 24 2020 08:56:42 AM MDTThe extractor and associated mechanism is prone to malfunction with enough dirt build-up.

I highly agree here
The Extractor is one of the most overlooked areas on a Pistol
It's not only there for Extraction
But the Extractor serves a large role in the efficiency of ejection too

  I  think just the chamber after so many rounds are passed through.

Another area of concern is the firing pin / striker channel as primer cup material and other debris can enter and cause light primer strikes.