Yes, Dawn dish soap can kill cockroaches when sprayed directly.

How Does Dawn Soap Kill Roaches?

When mixed with water and sprayed on a roach, the soapy solution…

• Clogs their breathing pores (spiracles)

• Breaks down their waxy outer layer, causing dehydration

• It leads to suffocation & death

This method only works with direct contact, it won’t have any effect once the solution dries.

How to Make a Dawn Soap Roach Spray

You can create a simple roach spray with…

• 1 part Dawn dish soap

• 3 parts water

• Mix in a spray bottle and shake well

Spray directly on roaches when you see them.

Dawn soap can kill cockroaches when sprayed directly by suffocating them, but it’s not a long-term solution. For ongoing control, pair it with proven methods like gel baits, boric acid, or extermination services.