Help with worms....

Ok people,

We have all seen the infamous THC worm right? Just google it and you will see a few pics.

SO, I have noticed that little "worms" have been burrowing into the stems of my ladies. There is a little pile waste next to the where they burrow.

Although, they do not seem to be doing any real damage overall, they have made it nearly impossible to sucessfully take clones.

Does anyone have any advice on a way to get rid of these worms? I have seen people suggest spraying alcohol on them. Any other remedies around for this problem?