I have to keep refilling my brake fluid every other day. What could be the problem?

Check around the insides all wheel wells (back side of each tire) for the signs of the fluid leak. Also check against the firewall at the brake master cylinder for the leak also. With it leaking that much it should be very obvious to you when you find it.

Yea I think dandyoun hit the nail with the hammer square on.He said to check the the backside of your wheels on the inside for a fluid leak(It shouldd be real noticeable with the amount of fluid loss).The brake fluid is probably coming from a bad BRAKE CYLINDER.If it is your local auto parts store can help you.If you are not familiar with working on brakes take it to your mechanic so he can install the parts you need,because I have a feelig with the amount of fluid loss,all the brake parts are going to be saturated with the fluid.DO NOT TAKE IT TO THE DEALERSHIP if possible.Just a small auto shop can help you with a brake job.GOOD LUCK!!