If you cooked vegie taste bitter, that means havnt wash off the
insecticide yet.
M.. Not true. Some veggies are meant to be bitter.
And the thing is. Even if you soak it for so long, its pointless.
Cause the insecticide has been applied so long and in so many
layers. The insecticide would have penetrated into the plant
already. Thats one of the reason why people opt for organic
veggies. Cause they dont use insecticides.
So the best you can do is just put it under running water and rub
the top layer of insecticide.