Oh Tir, I've not noticed that you have bad grammar, and you certainly don't sound uneducated nor unintelligent! English does have a lot of rules, and nobody remembers them all. I get my nose out of joint when I hear and read really bad mistakes made by people who should have better language skills, such as TV and print journalists, lawyers, and others whose stock in trade is language.
I remember that thread; I think it was 4Paws who started it. The 's thing was about its and it's. People tend to write "it's" for the possessive, but that's incorrect. The apostrophe can only be used in the contraction for "it is." Pronouns never have apostrophes in the possessive.
Billyporter (of the long brown hair?), warsh is also used in S.IL. I think my sister says that. When I was a child, I seem to remember that some people also "rinched" their clothes after they warshed them.