This is an older post but worth resurrecting. I spoke today with the Touch-N-Flow rep at the IPMS Nats. in Orlando about this problem. He told me that the loading method of the tool has been updated to using a small plastic bottle with a special applicator to load up the glue. If the tool becomes clogged, it's because melted plastic has found it's way into the tip. He said to submerge the tip in the solvent for a couple of minutes and to attach the small bottle at the open end, squeezing air to clear the clog out. I tried the bottle method and it is a better way to load and drain the tool.