It shouldn't affect the wax or sealant at all and won't remove any contaminants. It's literally just a glossing agent and used by most for either "topping up" the wax in between layering, as a drying aid after a wash or during claying to decrease resistance.
I use the Meguiars NXT Gen one after a wash every time, gets rid of any water marks and chamois marks and streaks.
That's the reason you are getting these marks. Get rid, now! It will also be damaging your paintwork massively!
PMSL, some of us are "working".Since Sy is quiet at the moment, I am going to take his praise.
So, "Thanks".
Good quality micro fibre towel. For example, my personal favourite, the Miracle dryer which you can find on the i4d site. I'd link you but the sites blocked at work.what should i be using to dry then? :S