I took the advise on using a wax based modeling clay to clay bar my car. It worked but the type of clay I used was too soft and would melt with any heat. Maybe a recommendation as to what brand of modeling clay works well.
The real issue with cleaning tips is it almost always turns into a marketing campaign by a manufacturer of premium products. There is no way I'm going to ever pay 100$ for a can of wax or 40$ for a clay bar so I think it is best to just generalize to the techniques of various chemical(paste verse liquid wax), different washes, etc.
Lastly, there is already so much discussion online and elsewhere surrounding detailing that you may just be beating a dead horse, so to speak. Keep up the good work!