I HAVE HAD 2 JOBS IN THE LAST WEEK INVOLVING SAND STONE. I HAVE BEEN CLEANING IT WITH PLAIN OLD HOT WATER AND A 2508 TIP. IT CAME OUT GREAT AND THE CUSTOMERS WERE SATISFIED(BOTH BUILDING CONTRACTORS, HARD TO PLEASE), BUT IS THERE A BETTER WAY THAT PRODUCES EVEN BETTER RESULTS? DOES ANYONE HERE...