It works like a charm Spectrum Labs is the way to go I have used it 2 times . Says to Nuke it for 10 seconds but I nuke it for for 15-20 it gets up to about 116 and starts to drop after a few minutes. i have done many tests on the temp and time issue . Hot Hands work very good with it just use rubber band with it make sure hot hands are not on the Therm strip side and use a knee wrap place on inner thigh and your good to go. 2nd time used had hot hands on it and got a 96 1st time didn't use hot hands and got a 91 ph was fine on both drops got to watch the icup change colors and the little old lady was nice enuff to show me how the test worked on the piss lmao yes it does work hands down best out there for swabs use biotene