Anyone use seven dust? I have a was problem and i went to home depot the other day. The guy instructed me to use seven dust. How effective is it? I spread it all over around the problem areas by my house. I cant even let my dogs out on their tie outs because theyve gotten stung. Last year i used regular was spray worked for about a week then they came back even worse. So does anyone have actual experiance with this stuff or is there anything better?