my tom tom is acting up, i have it on the rear view mirror( cant use the mirror) and it loses the satellite when i m driving down the road, it has never been this bad it always found its self real quick, i did the updates to it where it has the presets to know where to look for the sats and it still acts up? i cant say weather because it does it rain or shine, i keep turning it off and on to reset it but only sometime it works it cant be the spot in the truck its been there for a year!!! do they go bad? i was wondering if i bought a external antenna if that would help or do i need to look at a new tom tom? can i send this in and get it fixed? thanks!!!