What can i do with vape leftovers?

Either plain hot water (as in tea- or coffee-making); hot vegetable oil (as in saute frying); or organic solvents such as alcohol (as in an herbal tincture) will work to extract psychoactive compounds including those found in cannabis.

Since alcohol is flammable, it can be dangerous to goof with unless you use common sense and take some precautions. I think that alcohol will do the best/quickest job, but if you keep extracting over and over again, you'll get most if not all the active ingredients out by using any of those: water, oil or alcohol.

I've heard the process called "alkaloid extraction" (although THC isn't an alkaloid, since it doesn't contain any nitrogen), or "chemical (or herbal) maceration".

You'll end-up with everything that is soluble in that particular solvent: not just the "fun/good" stuff. With cannabis extracts, these other compounds won't hurt, but may be the bad-tasting stuff. I don't know if JUST the fun stuff would taste bad or not: perhaps it would taste like a good toke off of a vaporizer.

Anyway, with other psychoactive plant extracts, the extra stuff in the solution is OFTEN harmful, causing bad side-effects. In those cases, further processing can separate the fun stuff from the junk. Depending on what you want and what is junk, a different type of solvent (polar vs non-plolar, or protic vs non-protic solvent) is chosen to further extract-out the undesirable compounds.

I tried smoking one of my vaped left overs,it was one of the browner ones,I kinda wanna to use the most burnt one I could find,to see how bad it can be.
It was so damn harsh,I didnt get to smoke the whole thing,I just dumped it out,it was harsh as hell.I am definately not going to smoke it.....unless a Bong might help with the harshness....meh,I'll try it again with a bong.

The problem is that once you vape a lot, any smoke seems super-harsh compared to vapor.

Hot water is a REALLY inefficient (to the point of being ineffectual) extraction solvent. After all, the psychoactive compounds are nonpolar and water is polar. You need a nonpolar solvent. That's why to make weed coffee you'd extract first into heavy cream and then add THAT to your morning cuppa.

That's a really good point. It seems like anything with Fat content is the way to go. That capsule guide really got me thinking about it and heavy creams would be pretty good though extraction would involve heating it up too much in my opinion

You MUST be correct, stinky (you are SO smart!). So hot water is OUT for extraction purposes!

I was going by what my mom reported back in the 1970's. She couldn't stand to smoke, so she made "tea" out of my pot stems to help her sleep. I'll BET that she was just enjoying the warm liquid and just THOUGH she got some benefit from the stems (like the placebo effect, only with soothing warm water thrown-in!).

No wonder WikiPedia doesn't want "personal research" (like mine with my mom's "tea"). It isn't reliable or reference-able. I'll try to filter my "wives' tales" and "moms' tales" in the future!

There are plenty of places I can check my "facts" before I post!