I sent my older maxus back last year in march. Took less than a month if I remember correctly. Dropped it off packaged up in a plain cardboard box and shipping label at the main UPS hub. Was told not to use the local UPS store. It’s in the Max 5 camo, came back like new.
Not sure if the new ones still have issues becoming sticky, so I bought a Maxus sporting carbon fiber. It doesn’t have the duratouch.