I dry fire every night, maybe 12-20 times, out of various rifles and handguns. I don't use any snap caps or similar. I haven't had any trouble. An old trick to slick up your trigger is to dry fire maybe 20-30 times, while pressing HARD on the striker with your thumb. THis helps burnish the sear and trigger, and cleans any whiskers off. You might give it a try.
Tom