Wax solvents & wetting agents

Casters & Wax model makers, Does anyone out there use
"debubblizer" on a regular basis? We used to use one, years
ago… I don’t recall what it was, nor whether it was of any
real use… Also seem to remember putting a drop or two of
something in the investment? Wax solvents I have used/still use.
Anybody have a “pet” formula for any of these? Brian P. Marshall