Goltix was always bad for that... I used to remove all filters and flush out, then remove nozzles for a final pre winter flush out. Sometimes used to run an Autumn Roundup tank or two to clean deposits out before the final washdown and put antifreeze inI use one sprayer for everything. Bateman Hi Lo. The problem we hard when we used a separate sprayer for beet was sediment built up in the lines no matter how well you flushed it. It would dry out over winter then flake off during the next season causing bother with the nozzles.
So we just use the Bateman for everything. I normally washout the 2000 litre tank with 2 x 100 litres of plain water. If I’ve used an SU I’ll do that then go back to yard to refill wash tank with another 200 litres, add all clear for the first 100 litre wash leaving it in the lines and system for half an hour or longer, spray out then then wash out again with 100 litres clean water. So it’s only SUs that require a trip back to yard to refill wash tank and pickup the tub of all clear. Make sure to flush the filter during the wash to clear out any partially dissolved particles. Sometimes I’ll take the end nozzles off the lines and blast them out.