Hey, kind of a PSA thing..... When you get your propane bottles filled...wherever the hell....don't trust the dude to get the bleeder screw all the way tight.
I had noticed faint, periodic gas smell in my garage last week. I checked all the valve handles and actually did find a couple that tightened up "a little bit". Day or two later, smell it again...tonight I found one bottle with a "not completely tight" bleeder screw. I think that was my bitch kitty.