Obviously do this with the windows all the way down.
In channel window visor problems.
No window contact also because of their out of window design tape on deflectors don t make any contact with the glass or window mechanics.
Pull out the pieces and don t worry if the rubber gasket comes out with it because you can clean off the adhesive and pop the gasket back in the channel.
Quick discussion on installation of in channel versus exterior auto vent shade window visors.
In channel vent visors do not have this benefit.
I ve only had in channel visors on my vehicles as i think the outside mounted ones look pretty awful just my opinion but i ve never had any problems with the power windows not operating properly.
That means there s no risk of scratching the glass or interfering with window operation.
The heat will allow the visors to flex into place.
In both cases no drilling is.
Obviuosly the first time you put them on and roll up the window it ll be a tight fit but that s what helps them seal.
Leave the visor in place and do not roll the window down for a few hot days to allow the window with the visor mold into place.