Problem:

Fast lane is prompting a "Bills not removed" bill dispenser error.  
Error Code: 5-0-0--99-206

The customer has already taken their bills


Solution:

Open the Fast Lane bill dispenser compartment.

Locate the clear plastic piece as shown in the pictures below.

Take a paper towel and wipe the top of the clear plastic piece.

Close the access door and reboot the Fast Lane.