How to prevent rust surrounded by wash contrivance? I'm getting a new wash machine, how do I prevent the...

I'm getting a new wash machine, how do I prevent the holes at the bottom from forming rust? I don't get the message how my current machine get rust because it always drained ably.
I finally showered this week and..?
Answers:    Make sure you remove the clothes from the machine promptly when they are finished wash. Leave the lid open so the tub can nouns dry.
Chocolate stains on 100% polyester skirt due to...