This is usually because of the accumulation of ultrafine dust on the surface of the PECO-Filter. This fine dust layer can block some of the light, but it should not significantly impact the effectiveness of your Molekule. Once you replace your PECO-Filter with a new one, the light level will return to normal brightness. The Pre-Filter is designed to protect the PECO-Filter from dust build up and extends the life of the PECO-Filter, so it is also important to replace your Pre-Filters regularly.
If it’s been 6 months or more since you changed your PECO-Filter, you should replace it with a new one. If you don’t have new PECO Filter to replace the old one, please read this article about how your Filter Subscription works.
If you’re using the Molekule app to monitor filter status and would like us to reset your Filter Status Indicator after replacement, please contact support.