Yes, any detergent will kill fleas. They lower the surface tension by acting as a surfactant and thus damage the flea's exoskeleton. A foul-proof method to drown the bugs in the water! However, allow roughly 5-10 minutes after applying the dish soap and then rinse the pet.

What detergent gets rid of fleas?

Set out liquid dish detergent—Make a simple toxic solution that will kill fleas instantly. Add 5–10 drops of liquid dish detergent to a bowl of water.

Can a flea survive the washing machine?

Washing your clothes is an effective way to clear them of fleas. However, this effect is due to the deadly, dual action of heat and laundry powder, as fleas are very unlikely to drown in the washing machine. Fleas are impressively resilient bugs and can survive for up to a week in water.