I want to replace the carpet as I am renovating. However, I have a smelly issue with the floorboards under the (now) removed carpet. I believe the board is masonite or MDF, and I removed the carpet and underlay as it smelled of mildew. The smell is still within the boards, and I have left the room to 'breathe' for 4 weeks but the boards still smell. Does anyone know what can be done, as the room is unlivable with such an odour?