508d advice

So I've been tinkering on and off with this for months now but can't seem to perfect it, seems to work spot on when my nose just touches the drivers side glass yet when it is set like this the passengers side won't chirp at all. This is fitted into my Peugeot 306 3 door under the centre console under the handbrake lever and is central between the two windows, the car has a sunroof and it will not fit up by the interior light. I have tried to move the 508d off centre to compensate but there isn't an awful lot of room to play with there. Any advice you pros could give would be great/ or is it just the way it is? Also maybe I'm trying to adjust it too sensitive, as I've noticed that in sunny England here when we had a little heat wave recently that seemed to effect it as well. Cheers in advance.

No way of changing, they are all sided.

So you can never get it even? Would you say I've got it in an OK location for my car?

Yes.

Thanks Howie :-)