I need some advice for a problem I had today with my S&W 686. I was shooting .38 specials and after I fired my last round I attempted to empty the cylinder but I could not get it to swing out freely. I eventually had to push the release button and pop the cylinder firmly with the heel of my hand and it came out. I've since cleaned the gun thoroughly but the problem persists. The hammer can still be pulled back and the gun was fired again after I first noticed the problem but the cylinder no longer comes out easily. Any advice or help of any kind would be appreciated.