How old are they? If they are about 25 years old or more they will probably be very dim and should be replaced. The halflife of Tritium is only 12.26 years, so after 25 years their brightness would be about 1/4 of what it was new.
If they are less than 6 years old and not working right they are defective or broken, the tritium has probably escaped.
Either way there is nothing to clean that would help.
Getting a replacement Tritium ampule that fits may be difficult and/or expensive as the US has no dedicated Tritium production reactors since the shutdown of the Savanna River site in the 1990s.
Check the gun auction sites, do a google search, visit a local gun shop, etc.
Coat the rusted area with gun oil and let sit overnight. The oil will loosen and work its way into the rust.Pour a liberal amount of gun oil on the rusted area when you are ready to clean.Rub the rust spot lightly with a piece of brass wool or use 0000-gauge steel wool. Don't bear down on the gunmetal; use a gentle touch and take your time to avoid marring the metal finish.Use a new piece of brass wool as the old piece begins to fall apart, making sure to wipe off the brass shavings from the gun.Pour gun-bore cleaner onto a clean cloth and rub down the area where the rust has been removed. This will help treat the metal and make it more rust resistant.Wipe down the gun metal with another clean cloth to remove any residual cleaner, rust or brass-wool shavings.
Try the library, blue book of gun values, gun shop, gun show, want ad.
In Portuguese, the native language of brazil, the word gun is arma.
through an electron gun beams of cathode and anode comes out.
I assume you mean GUM, and not GUN. Chewing gum does not effectively clean your teeth.
The Clean Gun - 1917 was released on: USA: 26 October 1917
After every use.
"The proper way to clean a gun is to make sure it is not loaded, spray it with cleaning supplies to get all the gun powder out and then put it back together."
Not economically feasible. Yes there are several Red dot sites made just for BB guns and rifles. As long as it has a mounting rail on the gun it will work.
Any of the on line auction sites.
Tool websites are good sites to go to in oder to find the supplies you need. It depends on what type of paint you will be using as to which will work best. Metallic Specific Gun or HVLP gun for base and metallic work, and an LVLP or Reduced Pressure gun for clear coats.
Dishwasher
Gun shops, gun shows, internet auction sites such as gunbroker, auctionarms, gunsamerica. I did check a couple of my gun parts sites, and they have none, or have sold out.
Try the blue book of gun values, on line auction sites, a gun shop or gun show.
Try on line auction sites, gun shows, want ads, gun shops.
Check the auction sites, on line gun stores, etc..