Yeah the tips were good but honestly, I would stop worrying about infections on your feet. I've never, ever gotten an infection on my feet, not even on an open blister. And I've never gotten a blister from my cycling shoes.

I have picked up nail mycosis once but that was waaay before I cycled.

Are you being a bit obsessive, perhaps?

The smell in cycling clothes is also less from the bacteria and more from the fact that wicking fabric "ultraconcentrates" your sweat when it evaporates.

I've never thought about sleeping in elderly sheeting not being healty...

I think you worry too much.