It’s inevitable. I find this mistake in nearly every piece of writing I edit, and it’s one of those grammar errors that drives most seasoned editors completely insane and probably brings your former grammar teachers to their knees crying.
No worries. This is an easy enough mistake to fix. “It’s” is a contraction of “it is” or “it has.” “Its” is a possessive pronoun as in “your writing has lost its mojo.”
Avoid this mistake by proofing your work and reading the sentence out loud. Replace “its” with “it is” or “it has” and if it doesn’t make sense, you’re using the wrong word.