I noticed that the trigger pull on My 590A1 is heavy, so I put it on my digital trigger pull gauge and it averaged around 8 3/4lb's. I decided to remove the trigger group from the gun and lube it up. I sprayed it down good with gun scrubber and then lubed with rem oil. While I was doing this I lowered the hammer down slowly on my thumb. When I went to recock it, it took a few attempts but eventually the hammer cocked. Now the hammer will not drop at all even after I install it. I don't believe any springs or such fell out while I was spraying it down. What gives?