VictorioPortable Hand Crank Ice Crusher VKP1126

The hardware at the end of the shaft opposite the handle keeps coming off. How can I remedy that happening?

how to you clean it to prevent it from rusting?

Do you have to use ice cubes of a certain size? We have what I'd say are "regular" size ice cube trays. Do they need to be smaller?

How do get base to hold? Handle doesn't do it!