yeh, have a look at what kinda numbers you are pouring in to the pots. if you're anything like myself and
@NiceOption you might find it's a higher number than you imagined, but as you're already on nice distilled water i doubt it'll be as severe as what we found once we started monitoring. i found some of the AN additives really bump up the PPM, even the Voodoo Juice had more in it than i'd imagined, can't comment on the B52/Piranha as i didn't use those. CalMag is also pretty potent stuff.
with soil, it grabs hold of all the goodies you pump in to it really well. so, say you put in 600PPM/1.2EC, with no runoff. the plant will take what it wants, and the leftovers will stay within the pot. over time, that excess leftovers builds up in the pot with only the hunger of the plant to keep it in check. a water-only feed can revive those leftover nutrients and make them more readily available for the plant to uptake again (by my understanding) which can help you with some of the leftovers and maybe even all of it. alternatively, feeding to runoff essentially pushes the unused salts down and out of the bottom of the pot, leaving your nice new fresh feed to replace it. what i don't see mentioned much and i wish i had better knowledge/understanding of this before/during first, second and third grows, is the impact a build up within the plant can have on the final product...i've never been shy to admit the first plants i grew, whilst looking nice enough with no major health problems, had lacking results in terms of the smoke - wouldn't burn all that well and it was harsh to say the least...but the buds looked 10/10 and smelled great. this lead me to make a lot of changes to my grow style and i believe 99% of my woes were caused by me not keeping the medium in good condition by pumping too much in to the pots, allowing the plants to wallow in high PPM soil, which also makes in-pot PH levels jump around like a box of frogs which will lead to all sorts of deficiency symptoms also.
so let's see what numbers you've got and then we can come up with a plan. also second/third opinions always welcome, i'm very much still learning myself but this oversight has been my biggest hurdle personally.