I have always just done it stovetop, and added the packet to boiling water. It mixes in pretty easily and stays hot for a while.
On another note... how do you all apply this stuff to your hair? I feel like I get it everywhere, make a mess and waste half the stuff!
2b/c, med to high density
LCLF: fine, medium porosity, normal elasticity
Mod-CG: low poo & water washes, no co-washes
no sulfates, no silicones, no polyquats
HGs: FSG, gelatin PTs, pixiecurl diffusing
Growing out a chin-length bob, just reached collar bone length!