Took a punt on ordering one of these the other day. With all the rain we have been having the interior of the VX had got rather damp from wet shoes and jackets etc being inside and as a consequence was fogging up quite a bit so thought I'd give it a go. Left it on the dash for two nights and it seems to of helped a lot. I guess the ultimate test would be to leave it in a car that's outside when there's a frost. My car is normally garaged but I may leave it outside and do a with and without test over the next couple of days.
When the sachets of silica go a yellowy brown indicating they have absorbed their limit of moisture you can rejuvenate it in the microwave or oven and it should be good to go again.
Anyway it may be worth a look if you want to try and save a few minutes of hassle on a cold damp morning.
Edited by -Dab-of-Oppo-, 21 January 2014 - 08:17 PM.