I normally request extra towels, and shampoo when I travel with my family. As the 3, or 4 towels just don’t do it for us. Very rarely is that request fulfilled when we arrive. I end up having to go down to the front desk, and ask.
The article link below gives you some insight on some tips they recommend doing. If you have not already tried any of their suggestions give it a try next time you are staying at a hotel!