Thought I would share a spray I found some time ago.

I use NextZett Vinyl Extra Rubber spray for rubber and plastic cleaning / conditioning.

Whatever you do, do not spray it on any belts!

I just use it with a microfiber towel and use brush to work it into tight areas. It's a great spray and really cleans up the engine bay!

I saw some will pressure wash under the hood and was always worried of the consequences of that. Never seemed like a good idea IMO.

Can get this spray from NextZett or Amazon: nextzett Vinyl Rubber Extra- Vinyl Rubber Plastic Protectant (nextzettusa.com)