Since moving to Hong Kong, I consistently see about two cockroaches per week in my apartment. They're not the big ones that can fly, but they sure are quick! They're about the diameter of a one dollar coin. Last night one crawled into the gas burners in the kitchen so I turned on the flame...but it escaped before catching on fire!
Most of the time I see them in the bathroom, but sometimes in the kitchen or bedrooms as well. I have no idea how they're getting in! I keep my house very clean and I never ever keep kitchen garbage overnight. So far I've sprayed my main door with RAID and laid poisonous traps all over the apartment. Just wondering if there's anything else I can do. I'm thinking the next step up is to do a complete lockdown at night time (i.e plug every sink hole and shut every window)
I also live on the 11th floor of a 20 year old building if that makes a difference.