>> I use a couple drops of an anti-foam product that I get from my
>> inside source in the food production industry.
>
> Oooooh, trade secrets, you lucky thing. ;-)

Interesting thought... foam control agents are available, such as for
the homebrew beer crowd (to prevent overflow of the boil or the
fermenter). Look he http://www.morebeer.com/ and search for "foam
control" ...