Cleaning cartridge detection contacts?

This morning I’ve had a few stoppages with the printer complaining about the cartridge being wrong, or unknown, or missing. It makes me think it may be necessary to clean the contacts. Is there an easy procedure for doing this? The contacts on the printer, I mean. The contacts on the cartridge are easy to spot.

IPA on a paper towel or lint free cloth, done many times on the Form 2. But for Form 3, being so new, I’m surprised you are getting these errors.