Replace your mask every 3 months.
The mask is the harder plastic portion of your interface. Replace the softer plastic cushion insert or pillows that actually touch your skin more often.
Most insurance will replace the entire CPAP mask every 3 months and the cushion, if it is removable, on a monthly basis.
Sometimes when leak is persistently bothersome, it is necessary to explore other mask styles. Depending on your anatomy and personal preference, you might find another that fits better.