I am sorry to hear about the rotten wings, prevention is better than cure, the front wings collect road mud behind the plastic trim, and behind the mud guards, as part of the cleaning process, hose behind the plastic trim, you will be surprised what collects there every month.:doh
Cleaning cars.....what's that :nenau 5 minutes a month, I use a brush on a pole with a through water connection, with a 6 foot pole you can wash the car roof etc without splashing your shoes.
Better still, remove the 4 or 5 screw and remove the plastic wheel arches, clean behind them, then...... here he goes again... waxoyl them..:doh:doh
I checked mine last week to top up the waxoyl and they are like new, perfect.