This Nerd Note addresses one of my biggest pet peeves—the inappropriate use of the possessive its.
For example, It’s cold outside.
There is no possessive form of its.
So, unless you mean it is or it has, you never use the apostrophe with its.
For example, Is the sock with its mate?
Remember that Associated Press Style encourages writers to be gender specific when possible. So, instead of intending to use its in the possessive form, insert his or her when possible.
Now go forth and use words correctly!