Well after you make a few messes, you remove a little brake fluid before you push the pistons in. But I usually do a brake flush at every brake service now. Topping up is ok, most cars have a brake fluid level sensor that will tell you you need a little esp if it has ABS plus you might have a brake fluid LEAK in the system and you dont really want to run out of fluid. So just keep it in between the max and min level or about 1/2 in below the top if there are no max/min indicators.

Ducit Amour Hybridae
Mark Smith
Master Certifited Technician
Tempus non reparabilis fugit
"It isn't pollution that's harming the environment. It's the impurities in our air and water that are doing it."

Best Tank 35.0 MPG

...I never top off my fluid. Low fluid tells me there is something wrong. It may need pads/shoes. Or, there is something leaking.

2008 FWD Escape Hybrid