It is important that your mask has time to dry out after use. One method is placing your mask in a paper (not plastic) bag at the end of the day. Write the date on the bag. Use it again after 3 days.
It is also important to have the mask “fit-tested” to assure a good seal on your face.
Another tip is to use a standard surgical mask or a home-made mask over your N95 to protect it from splashes and gross contamination.
Most of the hand sanitizer that has been donated is in large containers. consider keeping your smaller containers and refilling them.