My eyes sting when I apply artificial tears. Is it okay to keep using them?

I am using artificial tears because I have severe dry eyes.
It seems less dry in the summer, so I didn't use it for a while, but I recently started using it again.
Maybe because I haven't used eye drops in a while, but when I put artificial tears in, my eyes sting a lot and turn a little red inside.

There is still a long shelf life remaining for artificial tears~
It didn't feel this stinging when I used it a few months ago.
I'm not sure if it's because I haven't used it in a while or for some other reason.

Is there anyone experiencing stinging or irritation in their eyes due to artificial tears?
I'm not sure whether it will get better if I keep using it or if I should stop using it.