Summary: Have you seen this or are you suffering with this issue? This can be easily fixed dust can sometimes cause streak marks on your ceiling this can be due to poorly insulated attic spaces in the marks can be left because of temperature differences between the inflated spaces in the position of joist.
Couple things you can repaint, which may not be an option. But if you simply going to attic and spend some time sprinting existing installation this can make a big difference. Once this is done assess the situation and if needed and more installation.
It's as simple as that will reconsider this best of luck getting this issue resolved.
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