In article <[log in to unmask]>, Bob Harrison <[log in to unmask]> writes >The easy way of doing ten to twenty at a time .........etc A pressure washer, set to the highest temperature, just blasts them clean in seconds. We stack them against a fence about half a dozen at a time and just get the jet onto the grids. It is really quick to do a good satisfactory job, around 100 an hour, sometimes more. For gleaming perfection it takes a bit longer. We have our own pressure washer, but they are not expensive to hire. Be sure to get a powerful one which can go right up to steam heat, as small domestic sized steam cleaners are a lot slower. -- Murray McGregor