Don't use WD40, it will attract dust and dirt and makes things worse.
Instead use PTFE spray which is a "dry" lube that doesn't attract dust and dirt.
Plenty of brands out there, check your local auto parts store or Fleabay.
Instead use PTFE spray which is a "dry" lube that doesn't attract dust and dirt.
Plenty of brands out there, check your local auto parts store or Fleabay.