The short answer is, it depends on the type of steam mop you have and the type of floor cleaner you're using. Some steam mops might be okay with a little bit of floor cleaner added to the water, while others might not be so happy about it. It's like trying to put gasoline in a car that runs on electricity - it just won't work!
But, on the other hand, some steam mops are specifically designed to be used with floor cleaners or detergents. These mops usually have a special compartment or design that allows you to add a little bit of cleaning solution to the water. It's like having a special superpower for your floors - you can give them an extra cleaning kick whenever you need it!