I know this isn't the main jist of the thread, but I fall into the class of riders who USED to be great at patching tubes. Now I can't get one to hold for anything. They all seem to be solid while the tube is flat, but once the tube has some air in it, the patch starts to pull away. I've tried reversing the process (with small pinhole flats) by applying the patch while the tube is inflated. But once I deflate to reinsert into my tire, the whole thing crumbles up and falls off. Oh, and yes...I do wait plenty of time for the glue to dry.

As I said, I used to patch tires successfully all the time. Now, even with Park and other name-brand repair kits, I am totally useless for patching. What's wrong with me?