Having to do some DIY boot repair to my Asolo GTX boots.The sole came unattached in three places on the toe cap. First I cleaned the boot and got all the crap out of the openings. I then took some rubbing alcohol on a Q-tip and ran inside the openings to make sure I got everything.
Then take your toothpick and get a good size dot of shoe goo on the tip and work it down into the sole. Once you have done that use some packing tape to hold the sole to the toe cap. I let it set for a day before I took the tape off.