Today I learned something new.

My #1 son  runs a window tint and auto detailing shop. He has done so for
nearly thirty years. In that ti e he has experienced just about every thing
in the way of rubber, dash, and seat plastic restoration. Today he put me
onto it.

Three things are needed. Liquid Wrench silicone spray lube,  some plumbers
silicone grease, and Mcguires Swirl X. Add to that as an extra some Rain-X.

Spray the rubber down with the Liquid Wrench sikicone first. Gently wipe
off. Next apply silicone grease. Wipe off gently. This will restore and
preserve the rubber.

To clean the glass and remove the silicone overspray use windex. Then apply
the Rain-X!

To cean and polish any plastics - hub caps, vents, even tires -use the
Mcquires.

I did this  to my Carat and now it's outstanding.

Good luck.

John the Gimp