salt

Well I noticed today my passenger side headlight isn't working. After an inspection, the shelf underneath the headlight housing that most people seem to store there ballast in, was damp and full of bloody grit and salt! The ballast is badly corroded as seen below I've...

how bad is for cars the salt they put on the streets to melt the ice?how often do you wash your cars because of it?finally do you have to get the car up and wash it from underneath?cheers!