.22 H&R 939, This may seem a problem on the cylinder? please help.?

I went to the range again today, after a lot of shooting, I noticed on the third time I reloaded the cylinder with .22.... when I tried to slide the cylinder out for reloading; I noticed that I can't remove the cylinder easily?!

Then I also notice, there's a lot of accumulation of burnt gun powder/primer on the cylinder's front. (actually, everytime I fire, I see muzzle flash on two areas of the gun, one on the cylinder's front and ofcourse, from the barrel.)

It might be the reason why my pistol is having a hard time for its cylinder to be removed/taken out. As far as I had observed, I think the gun powder contributed on clogging the swivel area of the cylinder?

And this might be the cause of my late question regarding why some of the ammo is not fired, most likely caused by difficulty of rotation from the cylinder, due to the excessive accumulation of burnt gun powder from the .22 caliber round.

(talking about that, is there a so-called ''clean'' .22 cartridge? if so, can you specify some that are not so expensive at all?)

anyway,

when I cleaned the cylinder's front again, it turns good and can be taken out again for a reloading without a problem.

This time I greased everything with machine oil (a guy said that machine oil protects metal from accumulation of any matter, he said. I didn't really buy it but it's the only oil available at the time, so I applied it on my pistol's cylinder area.)

But what could be done to eliminate this problem?

Is there a way to stop the accumulation of the gun powder on the cylinder area? Like especial oils or solutions?

Should I or Am I supposed to oil the cylinder area (the swivel that makes it slide out), but, (right me if I'm wrong) I think, the oil contributes on the accumulation too especially on those area?

I tried to check the cylinder and everything on it, but there's nothing wrong within it's construction at all.

So if anyone has an experience on this problem, please, would you help me out?

thank you.