There was a difference between the outside air temperature and the air inside your tent. As the temperature dropped during the night, your tent walls cooled down and your warm breath, containing water vapour, comes out, and it's trapped in your tent in the form of tiny little droplets of water. With no escape, those droplets float around and land.
Having a tent window or door open is the best way. The air you exhale can escape.It really is the number one way to help reduce condensation. Consider your tent location,being close to rivers, dams, water sources can increase your chance of condensation due to humidity. Avoid bringing in wet gear Don't cook inside your tent Deal with it - with a towel
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