need to add brake fluid every couple day but mechanic shops find no leaks

What is your question?

Dash Brake light coming on; constantly adding fluid; no mechanic so far has been able to find a leak. Lines ok. Master cylinder okay. Looked around wheels. What could it be?? Ideas?.

What makes this problem better or worse?

Ongoing

How long has your 1999 Chrysler 300M had this problem?

6 mth