I'll second
@
catrains
and suggest (After thawing) doing a silicone treatment to the seals. I've used a heavy coating of armorall.
If you do take latches/locks/etc apart a big problem, IMHO, is that dirt/grease can accumulate over time. I've seen this in the bike industry as a tech where old shifter's grease gets so thick that it appears that the shifter needs to be replaced. In actuality the old gunk just needed to come out.
A secondary problem becomes the type of lubricant and the quantity of lubricant used. I'd suggest a thinner lubricant that only coats the parts needed and nothing more.
I'd love to throw all my latches, locks, etc into an unltrasonic cleaner to get it them really clean and use a PTFE based lubricant.
Just like chains on a bike drive-train: less lubricant is best in ALL cases.