Sorry but this doesn't really fall under the category of harm reduction.
Here's one valid HR tip though, you have no idea how much frost (meth resin) has accumulated, and you could potentially ingest a very large amount of methamphetamine if you aren't careful.
Most people I know add a drop or two of water and swish around everything and then CAREFULLY AND SLOWLY add heat (glass pookie + water + heat = broken pookie), or rinse the whole thing with more water and just swallow the water, that's what a lot of other people I know do, they orally ingest the resin from pookies and/or the meth-saturated bongwater. It's dangerous because there's no way of knowing how much of methamphetamine your about to take.
I expect I'll be closing this thread soon because of it's overall lack of HR potential, but if others can expand on what I said, feel free for the time being.