Overwatered or deficient?

Good morning, I am about to top my Headband clones that stretched a little bit, and I was trying to flush out the nitrogen in the soil so I would have better chances of rooting the top as a clone. Did I overwater trying to flush them?? Also look at my 1st picture... I cannot get that curl to go away??? Any advice or opinions would greatly be appreciated

if you flushed, you over watered.
if the clone is important enough to keep
make it important enough to root it
in a clean new substrate.

Why flush the N. N is needed in the rooting process.

For some reason I thought that nitrogen slowed down the rooting process.