Atmospheric air carries bacteria and mold spores, which settle on the surface of the water.
Your own saliva, if you’ve ever drunk from a glass, can promote the growth of germs.
Warm water (at room temperature) accelerates the proliferation of microorganisms.
Drinking this water in the morning causes a mixture of microorganisms to enter the mouth, which can disrupt the balance of the mouth and digestive system.
Insects, dust, and dirt: invisible dirt. A glass of water is a veritable magnet for pollution. At night, it can be exposed to:
Dust: Fine suspended particles settle in it.
Insects: Mosquitoes, flies, and other small pests can venture into it and even drown in it. Chemicals: If you use sprays (perfumes, air fresheners, mosquito repellents, etc.), these substances can contaminate your water.
Drinking water exposed to these elements first thing in the morning isn’t very hygienic.
Excessive nighttime thirst: a sign not to be ignored

If you wake up every night with a feeling of intense softness, it could be a symptom of a hidden problem.
What are the causes?