Wearing masks(face coverings) are the way we are going to help slow the spread, also helps protect us from COVID19
Wearing dirty masks defeats the purpose though so make sure yiu are washing them after every use(every use 8+hours of wear or when wearing it in close contact in big groups of people)
You can definitely through them in the washer but be sure to place them in a lingerie bag
I personally like to hand wash my masks
I use a splash of tide detergent in warm water in my bathroom sink
Scrubbing them washing them in thr water then wring them out and set to the side until you finish each of your masks you are washing.
Let your soapy water out and run more warm water in your sink, add a splash of lysol disinfectant solution.
Place your masks in this water and let sit 5 minutes or so, moving them around in the water, let the water out and rinse the masks thoroughly with warm water.
Lay flat on a towel(bath towel or any size that works)
Roll the masks up in thr towel, absorbing the majority of the water out of the masks
Squeeze the towel around the roll, you should begin to feel the dampness come through
Unroll and lay flat or hang to dry
Make sure the masks are dried competely before you wear it.
Stay safe and healthy