As a kid my Dad would show me how to use the oil can to put a few drops of oil on my bike:Pedals,chains, gears ,spockets and other moving parts.Now I still use that advise on my trailer: all rollers,pivot pins,all bolts and nuts,brackets for up and down centering,winch,u bolts and all moving parts.Take a moment to
check it over real good for rust and REPLACE whats necessary:bolts, lite bulbs,bushings and stuff.Makes for a safer trailer.Thanks Pop !!(He's up there with the Fisherman and Clammers Crew).
Good Luck out there. AJ.