Give it a good flush at first. Use 2-3 gallons of water per gallon of soil. This will be 1 of 2 main flushes. After the main flush just water normaly for a few days, then flush with 1 gallon of water per gallon of soil on the 5th day. Then water normaly and do one last big flush 2 days before harvest. This will flush any remaining nutrients. It's better if you do a 14 day flush so you can give it a day or 2 to sit and dry up before harvest. Hope this helps.
just remember to only add water if it needs it. If your mound or bucket is still wet just give it a little.