When i get flat i toss the innertubes i use new ones. And i wish i not have flat anymore. I have around 7 flats and finally i found out the rim strip had move and make the innertube go inside the spoke hole and burst. I take in two different bike shops the wheel one bike mechanic take out the rim tape and put back the rim tape have move. other bike shop mechanic give me the wrong size rim tape for my wheels. Finally i buy my self the correct rim strip size and the problem fixed after that i not had flats.