You don't need much to clean your pedals and steering wheel. It is important that you do not apply the same product on your pedals and steering wheel as you did on your dashboard. It is for safety purposes.
The products used on dashboards and trim are usually very slippery. You do not want to slide off the brake pedal in a crucial moment. Likewise you do not want to lose control of the steering wheel. By cleaning these key areas with a soapy water solution you get good looking and clean instruments but most importantly safe ones.