When should smoke alarm and carbon monoxide batteries and equipment be checked?

every few hours

but are there choices it could be better

The smoke alarm and carbon monoxide batteries and equipment should be checked once a month.

just put in mind that others aren't perfect. we all have problems that we feel makes us low of the low. but know that you are special and unique, that is what makes you out of this world : ). you might think and feel that others judge you, but mostly other people are scared if people judge them. just be happy, spend time with family, smile because that is the greatest medicine. a happy life. hope this : ))