This is probably just the worrier in me, but I just thought I'd check to be safe.
When I re-hydrate now, I put 1/2 a cup of water into a glass measuring cup, place a piece of plastic wrap over it, and nuke the bad boy for a few minutes to get a nice boil going. Then I let it cool while the wort is boiling, pitch the packet at ~90F and proceed as normal.
Any problems w/ this? Seems like the microwave + the act of boiling the water should make it plenty sanitary, no?