The house is very old, the door is about 10 years old. I have to slam, slam, slam it until it finally latches. I tried to look to see if the alignment was off either right or left OR up or down and I couldn't really see. I'm guessing, because of the slamming, that it isn't an up/down alignment problem. I live in Central Indiana and it has been rather rainy, so humitidy may be the cause. One thing that I should probably mention, about a week prior to this, I had a terrible time getting my key in the lock and turning it...had to wiggle it around till I could finally unlock the door. That lasted a couple of days and then it appeared to magically 'fix' itself.
If swollen wood is the problem, is there a remedy? I was afraid to mess with the hinges, could I do more harm than good by messing with them? If it actually is the lockset, how hard are they to replace?