Best Way To Clean Engine Bay?

[Meanee]

Recently lost oil filler cap while driving.. I am still wondering how's that possible.

The way I discovered the problem was smoke from engine bay. I've opened the hood and saw oil splattering from oil filler opening and no oil cap.

So after buying new cap and wiping off all the oil that I could with a towel, I still have lots left on varios parts. I was suggested to spray it with an engine degreaser and hose it down with water. However I am reluctant to do that, knowing that there are electrical parts there.

So.. what's your suggestion?

[1fastkia]

use the degreaser BUT cover the altanator. I always have cleaned my engines with degreaser and well i found out it dont like alts. other than that never had a problem. just dont use much water just enough to get the degreaser off.