This may be unpopular, but I don’t use the dividers at checkout. I just wait my turn. Once all the previous person’s stuff is scanned I start loading my stuff on the belt. By the time they finish paying, even with a tap card, I’ve got the belt full and I’m waiting again.

Some guy got mad at me at Costco recently for it. I guess he really wanted to get some stuff out of his cart while the person in front of me was still getting scanned. It feels like flooring it to every red light. You still have to wait, so what’s the point?