Surprisingly, your towels are supposed to be washed after just 3 times of being used. No more using towels for a one whole week without cleaning them.
On the other hand, Your sheets and pillow cases can be changed on a weekly basis.
Also, your cell phone should be rubbed down with a little alcohol. It’s a fact that your darling cell phone that you bring everywhere with you is the most DISGUISTING and GERMY thing ever. So every once in a while wipe it down.