Bests & Worsts Reviews from Amazon

I worked in pest control for several years. I know proper application. I no longer have my license to buy stronger chemical so I figured I would try this out. I shook the chemical, and performed all the proper crack and crevice work for my house. This did nothing. I actually found roaches nested on top of the areas I treated the next day. after several treatments over the month, I have given up. All I have to show for all my work is a empty yellow bug spray bottle covered in roaches. Don't waste your money on this product. It's garbage.