With proper cleaning and care each disposable nebulizer should last about two weeks. We know some people try and keep using them (they cost about $2.50 each), however they are made to be disposable and their effectiveness does reduce with time. There are 'permanent' nebulizers made that cost a lot more and last about 6 months.
If this does not answer your question, please call America's Best Care Plus, toll-free, at 1-800-638-6305. Our pharmacy staff are available to answer questions 24 hours a day.