Best way to scrape JWH from glass meth pipe?

I've smoked a half gram of JWH-018 out of an oiler (meth pipe) over the past couple weeks. The whole thing is just caked with stuff on the sides. What is the best way to get the goods out? I tried scraping with a straw and the stuff is pretty hard to get off. Would it be better too dissolve it out with liquid then evaporate? What is JWH-018 soluble in?

 

Soluble in water.
I'd boil it if it were a regular piece, but I have no experience with meth pipes, so it might break.
Just never use a coat hangar lol .

 

make sure you put the glass in the water when its cold.. other than that what smitty said sounds about right

 

I'm not entirely sure if this would work for 18, but tweakers just plug the carb holes of their glass pipe, and apply heat to the neck to melt the meth back into the bulb...might work, and it's apparent that you don't want to waste good chemicals.