Have any users of Permadent foundation found a successful way to clean the old foundation (especially that which has been used for brood nest area) in order to reuse the foundation anew? I am looking for a description of a way in which to clean the foundation without causing damage to it. Please do not suggest a solar wax melter or hot lye water - both of these methods do not work (they are much too hot for the plastic molded core). Please respond on the list or to me at: <[log in to unmask]> Dallas, Tx