mrchappell

I got a dwi in Feb and after many appeals I had to get a monitech device in my vehicle. I try and try and sometimes it works after many tries and sometimes get frustrated and give up. Does anyone here know how to hum and blow easier? Thanks, Michael

smacked

I have no idea. Have you called the manufacturer?

Taking5

It sounds like you are not following instructions. You should blow hard on these. Are you trying to "trick" it into thinking you haven't been drinking? Be honest please.

Dee74

I've no idea I'm afraid Michael.

If you think there's a fault, or you're not sure how to use it correctly, I'd contact the manufacturer?

D