My mask seems to be leaking. What should I do? Check all the connections. If your mask has a forehead arm or adjustment feature, try readjusting that first to correct the leak. If there is no improvement with the above steps, readjust the headgear straps. The mask should be as loose as possible while still creating a seal. A mask that is too tight against the face can cause leaks to occur by creating folds in the material. Talk to the homecare provider about trying another mask size or type if necessary.