Have found the same problem.Even when I find a machine it’s too complicated to work. All I want is an air-line, a gauge and a go-button that works when I put money in. I don’t want a load of digital displays, a hidden slot for money and no instructions. After losing a few quid by putting coin in at wrong time, I just gave up using ’em. Have a nice old footpump with accurate gauge which travels in the boot. Tricky to use with wonky leg but I get there.