Isopropyl alcohol is not really designed for the purpose you are using it for and is obviously too harsh. It will likely dry the plastics out as well, as they are petroleum based.
I use Meguiars Quik Interior Detailer, doesn't leave a residue and smells pretty good too.
http://www.meguiars.com.au/interior-care/quik-interior-detailer/
There are plenty of other excellent products on the market though.