My Son's bike has slime inner tubes. The bike has been sitting in the garage since last summer and the front tyres valve now seems blocked. Its has what feels like 15-20 psi in it but I can not get the valve to let any air out or take any more in.
I have no idea at this point how to get it to unblock the valve so I can use it again. For that matter I don't know how I could get the tire off as it has a reasonable (not ridable) amount of air in it without slashing the tyres (nice kings 2.2 which are pretty new).
I have tried putting the pump on it and putting a bit of air into it to try and clear the blockage but that didn't do anything.
Any ideas please?