Beware of "Corelle" brand of white dishware,,,they carry dirt/stains from dishwashing to dishwashing

My 90 yr old parents thought it would be a good idea to get rid of the white plastic plates they had used for years and the shine had worn off, so they bought a cheap set of "Corelle" that was very white and very shiny, thinking it would be low maintenance and easy to clean.

Instead, the backs of alot of the dinner plates have this grey haze that you can not scrub off with a kitchen sink scrub sponge and dish soap !! So they went back to the store and bought some "Corelle" polishing cream,,,for every day dishes !!??!! But it does not work very well or at all. This is crazy,,,

They are very weak and like the light weight of such dinnerware and dishes,,,were i have glazed ceramic plates that are much easier to clean, and look cleaner, but are much heavier, tho cheap.