There is a secured room here where I've been assigned a PIN, but the room's door is unlocked between 6am-6pm. Nevertheless, I always enter my PIN on the pad, or at least try to recall it clearly. Because if you're in the habit of pulling that door open during the day, 8 months later will come a time it is locked, and you won't remember your PIN because you've never ever used it.

The same goes for sterilizing such things in a medical setting. I think HCPs are very accustomed to the disposable and pre-sterilized supplies that they don't even consider an item's sterile status or the need to sterilize it after use. So this is the pitfall that comes with all the disposable stuff: that routine sterilization is forgotten as a skill or as a necessity.