Thanks. I ordered it last week based on suggestions on the x5 forum. Appreciate the instructions on using it.Use IRON-X. Just like I said don't let it dry on the vehicle. First spray down your car with water to take dirt off then spray Iron-X. Let it dwell for around 5 minutes and watch magic happen (all those spots will turn purple). If you have spots that are stubborn you can agitate it with sponge. Rinse the vehicle really good and wash it. All the spots will be gone. Like I said on winter time I use it almost every other car wash. Smells terrible but works great.