Well I have been growing in soil for about 5 seasons now and i use chemical nutes as well. When I start using my chemical nutes I flush the soil with regular water every other week, my tap water is about 7.4 ph, and I use 3 times the amount of water to how ever many gallons the pot is. So if its a 5 gallon pot I use 15 gallons of water to flush the mineral salt build up out of the soil, My last few grows I have been focusing on taste on smell and looking at my last grow I think this is a affective/easy method to prevent nutrient deficiencies, and get rid of salt build which will make the buds not taste so good. After that Its just a month cure away from smelling almost as good as it did on the plant. Hope this helps.