Which vegetable washing method can best reduce pesticide residues

　　①Light salt water:

　　Dissolvable formaldehyde and pesticide residues；

　　②Rice water:

　　The effect of washing vegetables will be better after being left for a certain period of time.；

　　③Flour water:

　　Decomposition of pesticide residues is worse than rice water；

　　④Fruit and vegetable cleaning agent:

　　Better than rice water but less safe；

　　⑤Blanching with hot water is also a better way to remove pesticide residues；

　　⑥Rinse repeatedly with clean water or peel.