as mr elite is on here.i wont really need to say much.

but i have never had any issues getting over spray off with clay.if you soend enough time doing it,and use a good clay you should get great results.

i never use clay with normal water either.and if its this time of year i have a bowlof hot water to leave the clay in when im not using it(too keep it supple)any chance to go cold and hard and it WILL scratch.
i use quite a bit of the detailer,and also you need to spray it on the clay not just the the panel.

doing a proper clay is so very important.prep is always the most important thing imo.so a good time claying will give a better result when you finish with your wax etc.

im wondering if you are keeping it supple enough,as if this isnt done then it wont "pick up" the containinants