Tithers was right, when the tire flat, run your fingers around the inside of the tire to find the thing that caused it, sometimes they are hidden and you have to dig them out. Look at the location of the flat and inspect the rim and rim strip in that area for a sharp burr or something like that, finally maybe the patch job didn't hold.<br><br>
I'd replace the tube and get on with life, but check the tire before you remount it, if there are a lot of cuts in it, replace the tire also.
I'd replace the tube and get on with life, but check the tire before you remount it, if there are a lot of cuts in it, replace the tire also.