Microwaving might work to remove bacteria/sterilize your K, but I'd be afraid of leaving it in too long and reducing the potency.
I really wanna IM, but I'm afraid of hitting an artery, and if my parents found a needle, they'd go fucking apeshit. I'm surprised they didn't go more apeshit when they found out I'd moved on from smoking weed to snorting shit.
Also, DXM is cross-tolerant with K, right? Because I just drank 454mg DXM (didn't feel like chugging two bottles, my stomach is shit from drinking last night), and I'm not feeling a thing. Or maybe it's the 9mg klonopin I took with it, LOL.