Answer: As long as you're using products with the same ingredients that don't irritate your skin, there's zero harm in trying new products.

Explanation:

Is it okay to replace your toner you use with another product and use it?

You can replace your toner, just make sure the ingredients are safe or it include and ingredient that you are allergic to.  It might ruin your skin if your skin is sensitive. If your skin feels itchy or you have rashes after putting the toner on, you might wanna discontinue using it. And if you have a different toner that doesn't feel itchy then you can continue to use it or try to find a new one.