Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Brake fluid vanishing? › Reply To: Brake fluid vanishing? February 11, 2021 at 2:56 pm #988776 micah russellParticipant That’s an excellent Idea, I’ll do that. I did go ahead and check the booster hose and removed the master, no fluid in there at all. Now to check all the wheel cylinders once my fingers have feeling again.