The claim “the only natural remedy to kill them all” is a gross exaggeration. Homemade mosquito traps can help reduce mosquito numbers, but they are not a complete solution.

Why Mosquitoes Are in Your Home
Mosquitoes are attracted to carbon dioxide, body heat, and sweat. They love standing water. If you have mosquitoes in your home, they’ve probably found a breeding ground near you.

A Simple Homemade Mosquito Trap
You can make a simple mosquito trap using yeast, sugar, and water.

What you need:
1 empty plastic bottle (2 liters)
1 cup hot water
¼ cup brown sugar
1 teaspoon yeast
Instructions:

Cut the plastic bottle in half.
Mix the hot water with the brown sugar. Let the mixture cool.
Add the yeast to the bottle.
Turn the bottle cap upside down and insert it into the bottom. Make sure the neck of the bottle is submerged in the mixture.

How it works: The yeast produces carbon dioxide, which attracts mosquitoes. They fly into the bottle and can’t escape.
What you can realistically expect:

Not a 100% solution: Mosquito traps can reduce the number of mosquitoes, but they don’t eliminate them all.
Other measures: The best way to get rid of mosquitoes is prevention. Avoid standing water, use mosquito nets, and spray insect repellent at night.