After a few months the tubeless tyre sealer coats the inner of the MTB tyre effectively creating a second skin. When you get a puncture the sealer cannot get to the hole and seal it. Adding more sealant does not solve the problem. The only solution is to remove the tyre clean off all that old sealant(which is a pains taking task) and then re-fill the tyre with sealant, only have to repeat it all again in a few months when the sealer no longer seals your puncher. I was wondering if anyone out there has experienced the same problem with the various tubeless tyre sealant out there. Is there an easy way of cleaning it off the tyre? Any tips?