As most of you know the crossfire comes with a tire service kit instead of a spare tire. I was wondering about the tire sealant in this kit. I have heard rumors about tire puncture sealants that you insert through the valve stem such as the brand fix-a-flat that it is bad and can damage the valve stem or rim or just make a mess inside the tire. I have also heard that is just a temporary fix and at the first chance you should have tire taken off and clean out the gunk. Just wondering your thoughts on this and if anyone has actually used the service it yet.