This is my first post. Have a Lopi Liberty woodstove with the air tubes for secondary combustion. Stove works great, but the air intake is slowly getting clogged (from ash?) Air intake goes to bottom front or tubes at top of stove (adjustable) How do I clean this out? Air compressor and shop vac? What is best way to do this? Do I need to take anything apart (remove air tubes, ect)?