Get a Rinehart, they last "forever". Rinehart uses "self healing foam". Bla Bla Bla. Mine lasted 1 1/2 months before the center was shot out on all 6 sides. Here is my experimental repair job. 1. Knock all loose foam from the target. I also blew it out with the air compressor. 2. Spray the repair area with water. Not a lot. Just make it damp. The moisture helps the foam to cure. 3. Wrap plastic wrap around the repair area. Poke the foam nozzle through the plastic and fill all sides. Starting from the center and filling outward. I filled clear to the outside. I'm using the low expanding foam from Great Stuff in the blue can. My reasoning is that maybe a lower expanding foam will be more dense than the normal highly expandable version. 4. Let the foam expand and cure for a minimum of 8 hours. 5. Cut off the excess foam from the target face, repaint if desired. I changed the orientation of the target dots so they don't line up opposite of each other. I don't know how long the spray foam will last but I figured for about $5, it was worth a try.