dan_the_man Prepsol will get silicon off , not sure about on tinted windows tho , but its used to prep paintwork .
I just recently had my door trims off to fix my door locks after having central locking hooked up to the alarm (they left a retaining hook unattached ) . I thought I'd have a look at the clunky windows while it was all off . Once the door trims are off , peel back the plastic so you can see inside the door cavity .
I found that adjusting the two top brushes eliminated the wobble in the windows . Also the window was coming down unevenly . There is an adjusting rail right in the middle of the door . It has 2 6mm nuts about 20cm apart u need to undo . Play around with this until you work out the right way to move it to make the window go up and down evenly . Worked for me .