The bacterial growth curve is usually exponential in shape just like most of the living organism.

Bacterial hand wash favors the growth of bacteria on the surface of the skin ( hands). On the other hand ( no pun intended) ANTI bacterial hand wash does not favor bacterial growth and in fact contains agents to prevent any bacterial growth on the hands.

The "danger zone" for bacterial growth are temperatures between 5 and 60 degrees

No, drug tests are designed with things such as bacterial growth in mind.

by distorting it