If you’re growing in pots, put little saucers under them and bottom feed…let the very top of your medium dry out…dust with DE…bottom feed for a little longer.
Then when you want to start top feeding again maybe water, then add a thin layer of dry sand or hydroton and dust that.
Not sure if any of that would work…but that’s what I would do.
Also heard of people just capping their soil with sand…