My meerschaums were bought new years ago, while stationed in Turkey, so I never had this problem. A quick check online shows the melting point of beeswax as between 144 and 148 degrees fahrenheit. Putting the pipe in the oven will probably melt the beeswax. There are some online posts on using food grade beeswax on the bowl to refurbish it. I couldn't find anything online on cleaning a fouled meerschaum, just general maintainance cleaning, but it may be out there. As for carnauba wax, I would never use it on a meerschaum. What comes to mind is using the charcoal treatment but there may be a problem of it getting embedded in the pores of the meerschaum. Just throwing it out for discussion. I would like to know the answer. By the way, thanks to rcstan, I learned of another source for a pipe reamer. I've been planning on getting a brush of some sort for light reaming.