How can you lose upgrades on your treat machine when you log on at the same time each day? This has happened more than once to me. If you get a treat every 24 hours and always log on around the same time, it shouldn't lose upgrades ever. Not happy!
Machine and Wheel reset at 00:00 o'clock (midnight) CET for me. If you log in everyday, you shouldn't lose upgrades. Pay attention to when you log in and when it resets. Anyway, upgrades are almost useless.