How often should they be replaced
1166403
that really depends on how often you cook and how much grease you generate. its safe to say one per year under average usage
950683
Don't know, I haven't had to replace them. But it's my understanding they last or thousands of hours.
741169
Not sure exactly, but I rarely replace them, I would say over six months at the very least
1278076
Bag and filter replacement will depend on the user's lifestyle. If you have children and/or pets and you vacuum daily, you will probably need to replace your bag every couple weeks. No kids or pets means replacement at two months.
1635490
I replaced mine when it was not working anymore. Otherwise if it's cleaned well, you don't need to replace it often or at all.
2095672
It depends on how many people you have in your house. If you have a full family of 4 or 5 or more, once a year. We have 2, I replace every other year.
677255
I heard from a professional that they should be changed annually, sonthey probably last a bit longer...
1909563
bulbs burn for well over a year but if you're plants are under performing they should be replaced. I would say replace at least once a year. More if you have light hungry plants.
1738592
I use them every day. I walk a lot and replace every 6 to 8 weeks. I think you'll like them
125453
I have had mine for a good year and a half of constant wear. Its a little worn down but still going. I would say about 1-2 years of every day wear before replacement
688120
Didn't have to use them that long. I do know someone who had the same ones and replaces them every year. THat is why I chose these.
1116733
Depends on conditions how well the safe seals and how often your in it, my guess would be 2 every six months. I use two in my toolboxes and change them every six months to a year depending on environmental conditions.
1885868
Yes! I don't know their longevity? If it comes time to replace one , I'm sure you will see "tell-tale " signs that it's appearance has changed enough to warrant replacement. I don't use them on a daily basis, just 2-3 times a week. I personally feel they are excellent. Compare them to others, watch " U-Tube", you will get the idea quickly.
124051
Sure, you can clean and reuse...in the manual it states that you must replace them every two months
63160
I am not sure have not had to replace them. My grand kids use them all the time.
677823
I usually change them about once a month. I rinse them off when I change the fountain once a week. Sometimes I get longer.
171969
I just replace according to the schedule they provide which for me is about once a month. I forget how to figure it out exactly. I have also read about how to refresh them but never done it myself.