IT IS ILLEGAL TO DISTIL YOUR OWN SPIRIT ANYWHERE IN AUSTRALIA AND WE AT TAS HOME BREWING DON'T CONDONE THE BREAKING OF THE LAW IN ANY WAY WHATSOEVER.

In our vast experience...

Click on the symptom...

Wash not 990:  Not enough water or too much sugar or poor temperature control.  These are 'racehorse' yeasts and need to be treated properly to finish the 'race'.  Make sure you fill the barrel after a couple of days.  Only use 8 kg of sugar or 9 kg  of dextrose per 25L.  Keep the brew at 26 degrees C.  Remedy:  Add a stuck yeast.

Wash not clearing:  Incomplete ferment (see above) or too hot for clearing.  Convection currents in the brew keep the sediment swirling, cooling the barrel will drop the sediment faster.

Wash bubbles over:  Fermenter too full to start, top up gradually after a couple of days.  Or a bacterial infection and a yeast ferment.  The latter occurs because of dirty equipment and the high nutrient, high sugar solution is excellent for bacteria, too.  Bleach everything.

Wash is thick:  Caused by a bacterial infection and occurs because of dirty equipment; the high nutrient, high sugar solution is excellent for these bacteria.  Toss the brew, bleach everything and start again.