Can this type of mask be hand washed with antibacterial dish soap , then air dry and be used multiple times ??

If the KN95 mask is physically dirty, it needs to be thrown away.

If you want to keep is sanitized, you put it in a brown paper bag for a week before re-use.

It it doesn't get physically dirty it can be re-used up to 20 times.

Yes. I hand wash mine in a bit of laundry detergent and hot water. 

I don't know, I've only used about five masks in the last year, and only changed them because the straps broke. I totally disagree with this whole thing. And no I haven't caught covid.

Probably not going to hold up too well.

I have a Nurse friend who purchased a UV Phone Sanitizer from Amazon for like 10.00 and she puts her mask in that….for a half hour.