Owning multiple face cloths allows for regular rotation and ensures you always have a clean face cloth available.
Aim to have at least 7 face cloths on hand for daily use. 14 would be a good number to build to over time, then you have a fresh one each day while the previous weeks used cloths are in the laundry.
Invest in a string shopper bag for your bathroom to keep damp cloths separate from other laundry to avoid dampening clothes. They will also dry faster in a string bag because air circulates better. Wash them when you do your towels each week and you'll soon be in a regular routine with it all that you'll always have fresh cloths available to use.