There are several home remedies that can help kill fleas instantly. Here are some of the most effective ones:

1. Dish Soap: Dish soap is an effective yet non-toxic home remedy for fleas. You can trap fleas with the help of warm water in a bowl and a moderate amount of dish soap. Once the fleas are trapped, they will drown in the soapy water.

2. Baking Soda: Baking soda is a great home remedy for fleas. It can effectively eliminate adult fleas and remove flea eggs found in your property. You only have to sprinkle the powder on areas where fleas are actively infesting. Make sure to reapply the powder after three days to get rid of fleas successfully.

3. Salt: Salt is another home remedy that is proven effective. Sprinkle salt everywhere or on carpets, let it stay between 12 and 48 hours, and then vacuum the carpets. Salt works by dehydrating the fleas, and it can help you get rid of not only fleas but also their larvae and eggs.

4. Lemon Spray: Lemon can be used in various ways around your home and is said to be one of the best home remedies to get rid of fleas. All you have to do is make a lemon spray by boiling the water and letting it steep for about three hours. Now, strain the lemons, and place the liquid you get into the spray bottle. The next time you comb your pet, spray them with the solution, and then comb them.

5. Herbal Flea Spray: To create a powerful flea spray, combine 4 liters of vinegar, 2 liters of water, 500 ml of lemon juice, and 250 ml of witch hazel in a spray bottle and shake well until they are fully mixed together. Once these steps have been completed, apply the peppery-smelling solution around your home using a heavy spray – target carpets, furniture, pet bedding, window sills, and floors.

Its important to note that while these home remedies can be effective, they may not completely eliminate a flea infestation. Its best to use them in combination with other flea control methods, such as vacuuming regularly, washing pet bedding, and using flea prevention products on your pets.