Very funny Steve, I am just a sucker. I'd almost rather just pay him not to come and then I wouldn't have to deal with him and wouldn't feel bad about taking money out of his pocket.
The label for Demon Max says 2005 on it so I assume it is about 10 years old. It is used by many pest control companies. I wonder how many people on my block have this stuff sprayed 4 times a year. The active ingredient is cypermethrin which has been around longer than that. Jacob is probably right, they aren't resistant, I am just probably having a lot more roaches than normal this year because Tim isn't here to scare them off (and we've had a ton of rain).