I'm on a CPAC device and the mask was irradiating the area under my nose. I decided to drop into State Medical and boy am I glad I did. Robert , the owner, also has sleep apnea. He has more mannequin displays with different masks than Walmart has overweight shoppers. Robert took his time fitting me with the proper mask and gave me free samples of mask liners, just might buy them. BTW he is a Registered Respiratory Therapist and has extensive training working in all our local hospitals. If Robert cannot resolve your problem I'm afraid there is no answer. They carry full line of other medical supplies as well.