In general you shouldn't use any nutes other than cloning solution/gel/powder, and you shouldn't add a bunch of water either. The goal is stimulate roots to search for water so you want it to be borderline moist but not wet. If you can put it under a tupperware or something to keep the humidity up.
Also it's a bit too late to do now but you should always cut the stalk off at a 45 so there is a bit of exposed innards to spawn roots.