Not all of us are perfect with our grammar and certainly there are some who have never learned how to spell. Do your best. At least on my screen, in the upper right corner of the reply/post screen, there is a spell-check option ("ABC" over a checkmark). You can always try using that feature to help you improve your spelling.
If you at least end sentences with a period and begin them with a capital letter, people will find them easier to read.
I can't tell you how frustrating it is to work for a $4-billion/year company and see e-mails from vice presidential level employees who cannot make the distinction between similar words like ...
Your vs. You're
There vs. Their
Break vs. Brake
Where vs. wear
It's vs. Its
So don't let the spelling issue take the joy out of posting.
Send me a PM if you want some private tips.
BillCA in CA (Unfortunately)