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.