Do you mean that after she washes her clothes, then puts them in the dryer, after they are dried the machine still smells of dirty clothes? Doesn't she use detergent? ugh!
Anyway, there is a product called Fabreeze free-nature. It's a spray that removes odors, especially from clothing. You could spray some on a rag til it is quite wet,then wipe the inside of the dryer. Wonder if that would work? There are other products like vinegar or ammonia too, but I would worry about doing some damage to the inside of the dryer. The fabreeze is supposed to be safe and gentle, it's some kind of corn product.
Or as you said, just hang your clothes in your condo to dry.