Do NOT use WD40, PB Lube or hot water!!
No idea why, but the spray lubes always make it worse.
WD-40 and other spray lubes attract dust, even in cold weather (static electricity?) and you end up with a gummy, mucky substance that jams everything up.
I found that out by fooling around with locks and getting a good hearty laugh from my locksmith before he explained it to me.
