Will a dishwasher harm insulators. If so, then what is best way to clean and make the shine?..................... This is a Harloe 206.5 I acquired for less than nothing at an auction..................................... Also, can anyone tell me how close to $4000 it is worth. That what one in mint condition is worth. This one has the tip of one ear broke off and the base has 3 or 4 small chips.