I teach drums quite a lot in different schools, and one thing that has been neccesary is drum mutes to go on the drums to reduce the volume of the kit.
One problem that has occurred is sometimes the pads fall off the toms or snare when playing.
To solve this problem, buy some velcro circles or strips of velcro and place two on each drum skin, one at 12 oclock, and one at the 6 oclock position, near the edge of the skin. Place the opposite side of the velcro on top, and then press on the pad on top.
You will now have removeable pads, which don’t fall off when drumming.
Sometimes the adhesive on the velcro wears out, or the velcro pad doesnt stay stuck to the mute pads. You could use some heavy duty glue to stick the velcro to the drum mute pad to solve this issue.