I picked up some schlage dual cylinder dead bolts on craigslist so that i could start learning to work in the C keyway. I met the guy in a Walmart parking lot and when i got the locks they were very gummy and sticky. looked like someone had filled the lock with graphite and then filled it up with some sort of light oil, the result was of course a muddy mess.
Being that I was at Walmart already I decided to get some of my go to metal cleaner, brake cleaner. When I was in there I noticed a can of 3 in one dry lock lube. It seems to be a dry teflon lube in a volatile solvent. it was on sale for 3 dollars for a 2.5 ounce can so I picked one up. After blasting out the locks with the brake cleaner I gave them a good lube with the teflon spray and it worked wonders.
For people that do not want to look further than your local wal mart or hardware store for something that is not Water-Displacement 40th attempt(WD-40) this is a great option IMO.