We always take our tops into the shower with us after training, we give them a quick wash there. Once they are dry we put them in the washing machine. The problem with stinky tops begin when you use them and then it takes you a few days before you put a washing machine with them in it.
Now, when we still get tops with awful whiffy arms which actually seams to be the black ones most of the time, I have my nan's easy and cheap trick ...all you need to do is buy the cheapest white vinegar and put the top in water with it overnight. The vinegar kills all the bacteria and other little animals that cause the smell...so you won't need hot washing machines that actually are not that good for the quality of your tops anyway