what's the best way to take it off of OEM sills @ 50F? i'm replacing the EL strip....
when i put them on i baked them @ 180 so it was nice and warm and soft and now i have no way of taking it off..

ALSO, where can i buy those kind of strong 3M tape and what's it called???

 

i'm not sure which ones you have, but my supercomputers are just overlays on top of the OEM door sill, just held on by 3m tape. it comes right off without much force.

you want double sided 3m tape, autozone/walmart/etc.

the red wrapper stuff. thin strips.