I tried using a Park Tool pre-glued patch that failed after 20 minutes. I'm glad I changed it a little before I left work. Anyway, the tube was still in the garbage pail this morning so I decided I would wash it - that can doesn't get used a whole lot since it's not by the public entrance, and re-patch it. I used to adhesive remover to clean off the old glue, sanded it, alcohol swabbed it, and applied a new patch. I inflated the tube a bit, just enough to have a decent amount of pressure to test the patch. But I was wondering if rubber cement type patches can be removed and patched again?

I've never been good at patches, so is it the recommended way to smear the rubber cement on the tube and let it completely dry (for that type of patch)? I think I will go back to my German patches in the small green container.

And I pulled out my tube that was flat 2 week ago and it was in a different spot. A little further from the stem and on the outside of the tube, so I will inspect that tire for the cause.

Thanks for the advice!