You mentioned *some* people using glue...are you saying that you did not apply a big *** of rubber cement to the plug before inserting it? I have always considered that a critical and necessary step. If you didn't use glue I would consider redoing it first. However it may be tough to pull the original plug out if it's worn down flush to the tread. May have to shove it all the way through.
None of the plug kits I've bought over the years have ever included the glue, thus, I've never used it. As I have not had an issue until now, I figured it was not necessary. HOWEVER, in watching a couple youtube videos after this post I saw a tip that was helpful... I may have used an old plug (kinda dry, less gummy). One guy said he always likes to use a recently opened pack for this reason. So, since today is a warmer day, it should be easier to remove the plug and put a new one in. I'll give that a try. I like your idea of pushing it all the way in if I can't get it out. That'll be my Plan B. (the tire has stopped leaking, by the way... I don't know why.)
you can try a little tire slime. Are you sure you are losing air at the plug?
I guess I don't really know. As that is the only visible damage it's certainly the most likely culprit. I have not sprayed the tire down with soapy water, though.
I used slime in a tyre after having a slow leak and not being able to find the leak. Leak is fixed but I now have a slight vibration caused by the slime throwing the tyre out of balance.
If this doesn't work, I'll go that route. Although, my mechanic will yell at me the next time he has to put tires on and deal with all the slime. I'm on a back tire so if it's a little out of balance, I won't feel it.
