putting golf balls in a washing machine?

My nephew spends his spare time searching the bushes of local muni courses to find balls and sell on ebay. He puts the balls in his dad's spare washing machine that he uses for for cloths. he puts them on a hot wash with two small towels inside and they come out immaculate.

Washing machine is still going strong.

Considering my wife goes NUTS when she finds a golf tee in the machine, i wash mine in the sink