Hi Starlette,
No it is not necessary to buy new mask after six months.
If your mask is working fine and you don't have problem don't buy another mask.

Hi Larry in cincy,
Thanks for the guidance. your tip worked for my cousin.
She was having this problem and her inhaler makes scary noises.

Hi All,
I don't have a solution for this but my cousin is having similar problem.
I will keep checking to see if there is an update or solution of this problem.

Hi jmcsmomma,
Don't loose hope. have faith in God.
Consult a doctor and a psychiatrist. Follow their advices and you will be fine.