Everything that I've read so far says that pouring cold water into a warm boiler is a no-no.
As I pull more shots, I become impatient with the wait for boiler cool-down, and then it strikes me. I can use my electric kettle to bring cold, fresh water up to a boil then pour it into the boiler! I can't think of any negatives, but maybe I'm missing something. Are there any reasons NOT to do this?