I really like Blaster PB50 all-purpose Lubricant for general stuff. It does not evaporate like WD40, but leaves a protectant film on the metal. Doesn't smell to high heaven. Get it a Home Depot or Lowes and is economicaly priced. Another lube I like is Hoppe's Elite Gun Oil....cost more than blaster but has a good lubrication film which stays and very low odor ( I can't smell any odor at all from it ) Odor may not be important to some but I've used some products that smelled, and in a not good way ,for 3 or 4 days. I also tend to clean them in the house and the wife complains when I use the stinky stuff. These two lubes get the wife approval.
gary