One thing that is always helpful when cruising the supermarket is to have a really good confused expression. I’ve got this down pat. I never know when to give up and bother an aisleperson to ask to locate something. I don’t know how busy they are. But if you walk around with a good confused expression for a little while, they’ll find you! Incidentally, eyes made uncomfortable with contacts and the squinting that bad contacts require really helps you out in this regard. You can have the confused expression even when it’s not your intent.
I’m good at confused expressions, but grocery clerks leave me alone for the most part, no matter how befuddled I appear. On the other hand, someone at Lowe’s will always ask what I might be needing; I suspect this is because I look like I’m too dumb to be operating power tools.