cloudy distillate

[CanadianWhiskey]

hey i dont know what the problem is
i have a 15 gallon ss keg, 2 inch copper coloum packed with stainless steel scrubbers, with a nixon head design

im using an 8 kg turbo sugar wash

im running mystill liek normal burning at 79 now the first litre that came out wasclear then progressivly it started getting bluer and bluer

when i was all done and took it apart i noted at the top of my keg especially in the condenser, where there was soder there was a greenish blue powder substance on it!

yu have any ideas. thanks