that's why that warning is there

in that case, paper clip, lighter, plate and knife.... heat the pipe good (almost to where you can't handle it, the hotter it is, the easier the resin comes off) and just basicly shove and pull out the paper clip for awhile (i'm asssuming we're talking about a glass pipe.... it'd be a bit difrrent for any other type) so it breaks up and moves around all the resin inside, bring it out fully, use the knife to scrape anything extra.... and then start using that clip (shaping it as needed) to pull out all you can onto the plate....

it takes awhile to get it all (or most of it atleast) but it'll get done with persistance... a helpful tip is to take a pair of pliars and bend the tip you plan on sticking in the pipe at a 90 degree angle (L shape) but only about as wide as the carb... it helps scrape and pull more at a time.