Cleaning your CPAP machine, mask and tubing is very important to prevent nose, sinus, throat and chest infections. It should also help your equipment last longer. The best information about your specific mask, tubing, and CPAP equipment can be found in the information pamphlet that comes with it. Your sleep apnea health professional is also there to help you with any troubles, contact them to discuss your concerns.
The Sleep Apnea Handbook has a great section on Device Care and Troubleshooting.