Mask leakage can be caused by a variety of issues. With your machine running, pull your CPAP mask away from your face so that the seal can be properly inflated. Then gently set the CPAP mask back into place. Another common problem is having your CPAP mask too tight. Try loosening the head straps to allow proper inflation of the seal. A misconception with many CPAP users is that a CPAP mask should be leak free 100% of the time. All CPAP masks will leak from time to time. Eventually your will need to readjust your mask if a leak occurs. Purchasing a different type of CPAP mask may not always solve your leakage problem. Always allow yourself ample time to adjust to the CPAP mask.