So you can tell when its nute burn right? alright well switch to just straight water no nutes and continue to do this until you see the plant "bounce back"
... basically looking healthy again...the way it looked prior to the nute burn... once you've reached this stage you can then introduce your nute solution back to the plant...at a lower rate than whatever rate u used and resulted in nute burn.
Consider this like a 2 minute penalty for excessive nutes...