I know I've said this before, I vaguely remember bringing it up, but it was a long time ago and you obviously didn't listen, so...
You don't need to include an apostrophe every time you write a word that ends in 's'! Ok. If it is a plural, as many s ending words are, an apostrophe is unnecessary, and in fact inaccurate. For example the sentence "the dogs were barking" doesn't need one.
So when do you use the apostrophe? Well if you were to write " the dog's barking was loud" then it is appropriate to use one, as it signifies ownership. See? Easy. At least it should be.
Another reason to use the apostrophe is for contractions, ie don't won't isn't etc. I can't think of one that ends in 's' so I don't know if this counts, but you know how to use them now. If you don't then study this please before getting back out there and writing your comments about dragon's and handmaid's because I don't want to see this again. And I have more lessons coming soon so get this one learned, please.
Thank you.