Or her family are eating tilapia, snakehead fish. I asked her just how to make carp, snakehead fish slime off. Thank you. (Do Thi Mong Hang: moonqh @ ...)
Want to clean the slime of fish or eels, snails: ash kitchen (old style), or oil of lemon juice plucking, afterwards rinse in cold water, drain. Will no longer viscous and not to lose the characteristic odor of fish, eels.
You used to mix vinegar, but also very thin.