Flushing a plant without a flushing solution

I need to flush a plant to clear out some salt buildup that has resulted in a slight nitrogen toxicity in one of my plants.

I’ve read that you should flush with a diluted nutrient solution to help bind and remove salts. Does that sound right?

I’m aware there are flushing solutions you can buy, like GH Florakleen for example.

Off topic slightly, but another thing I started to do when I’m watering with just water (I do “water water feed”) is water in half of it, let it soak through for about 5 minutes and then run the other half through. My thinking is that initial soak gives the water time to dissolve things like salts and then the last half of the water washes it out. Am I right

A slight nitrogen excess doesn't require flushing the plant. Just back of the nutrients and feed plain water.

Flushing products like FloraKleen, Clearex, Flawless finish, etc... aren't worth the price of the bottle they put them in. Sugar water, magnesium sulfate, Maybe some citric acid is all they are.

Citric acid is the active ingredient in many so called "Flushing Agents" is an effective organic pH reducer and chelator. It can also be combined with other biostimulants for foliar applications.