find a room in your house that is cold all the time, try this and then you will understand what im saying also tucking in curtains so theyre snug against the windows helps, air moving against cold glass, also this is the same idea with semi gloss paint, its a colder surface so it can cool your house down more
this will work differently in different climates when its colder outside and the glass on your window is cold so you have to be aware of when to pull up blinds to all the sun to hit the sheets and close the blinds when its done. there is some manual labor but not much and the payoffs are big
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