Your are doing good , crickets usually have an eight week life cycle starting from birth, I'd say grain of rice around that age is fine, the will do some ultra growing between 1/4 to 3/4 from my own experience. I had about a thousand cricket eggs that never hatched, it really sucked, I bought...
There is a difference bewtween dripping almost boiling water and misting, when you mist hot water it will come out cooler, but when you drip it, it is at the same temperature.
Don't let that get you down, dubia roaches are the greatest staple feeders beiseds crickets. The good thing about dubias are that they are more of a tropical roach and can only live under high temps, I would say about 85 degrees at the lowest and 100 degrees at the highest, since winter is...
I know it is not possible but you should try to get to a vet ASAP, also I suggest live plants, and try to feed him all at once,feeding before bed or a few hours before bed could mess up his metaboliosm. YOu want to try and get a fecal test done.
Is he in a low traffic area?
definately female, you can tell for yourself by looking to see if there is a bulge near the very front of her tail, if there is one it is a male, if not it is a female, not all chams. have this characteristic, i don't think so anyways.:o
Yep, definately a female.