Try running with a block of dry ice to cool the water more (from the outside) and maybe need to use less water/weight.... Much lighter, much colder. Report on results. But, wear gloves of course or you will have no fingerprints left and you won't be able to feel the steering wheel. Lots of drug stores and some places like mini-Costco's (Smart and Final markets, if you have them) sell dry ice near the regular ice section.