From personal experience, try to avoid using the TireFit sealant that came with your Crossfire. Every Crossfire owner should carry one of the inexpensive tire repair kits in their car. Also, keep needle nose pliers in your car so that you will be able to remove screws or other hardware from your tire prior to performing the repair. A vulcanized rubber tire plug will repair holes much more effectively than the TireFit sealant. The TireFit sealant is a one-use product and costs $60+ to replace in the event you do use it, while a tire repair kit costs <$10 and can be used multiple times. Also, if you use the sealant, the repair is only temporary not to mention it may eventually clog your tire's valve and cause the pressure sensor to malfunction.