Tonight we pulled out of the car wash and the TPMS light came on. I thought "what'd the car wash screw up and how?" 5 seconds later I knew the right front was flat. I put the spare on (great time to show one of the boys the basics of a tire change) and we drove the 55 miles distance home. Now I'm wondering is it safe to just put the spare back for future needs or is the donut tire (not the rim) supposed to be a disposable, one-use item?