The polyester-based polyurethane (PE-PUR) foam that caused the recall can cause various health issues and cancers, including lung cancer. The volatile organic compounds (VOCs) found in the foam are toxic and carcinogenic. Since the Philips Respironics devices do not have filters to prevent the ingestion or inhalation of these VOC particles and gases, the particles and gases move freely throughout the airpath when the foam degrades. This makes it easier to swallow or breathe in the debris while using the machine. The FDA has also noted that unapproved cleaning methods, such as ozone cleaners and ultraviolet light products, can increase the rate of foam degradation. This can cause further health problems. Foam degradation can also be affected by climate and environmental conditions. If your CPAP or BiPAP machine is stored in a location with high heat or humidity, this can increase the degradation rate. Often times, climate is out of our control, especially if you live in a region where this weather is the norm.