The best way to test if you need to clay is to clean your car as normal, then run your finger across a panel. If it feels rough, claying will help. Knocking Bilt-Hamber off the top spot is ...

Your car’s wheels take a bit of a pounding out ... It’s another win for the Bilt-Hamber Auto-Wheel, which combines a top cleaning score with great value, at £15 for a one-litre bottle.