Mortein PowerGard Multi Insect Killer

Don't buy. Very loud noise when working and the flies don't seem to be deterred – Having been used to Naturgard Indoor Automatic Control system, I thought this new PowerGard Multi Insect Automatic Indoor Outdoor Spray would be similar. The hiss it makes when the product is expelled is fine, but it makes a loud unacceptable 'snort' on the recoil. I spoke to Mortein and they said that 'they can't guarantee which tin will make the noise ' They will not refund as it is a 'design issue' Advice - don't buy!