I live in the U.S. When I got married back in 1974 my husband and I moved into a small cottage on our college campus. I had never ever seen a cockroach before. Didn't even know about them. Imagine my horror when I opened up a kitchen drawer to put silverware into it - and bugs with wings began running out of the drawer, onto the countertops..... everywhere. I screamed! DH came running and began laughing when he realized I was freaking out over roaches. He then told me that every place has them and that they are just a way of life when one lives in a warmer climate. Well, they were NOT going to be a "way of life" for me. With much trial and error, I eventually discovered that any kitchen cleaner which has a good amount of pine oil in it will make those bugs leave the apartment and go elsewhere. Breath O' Pine was my cleaner of choice because it had 25% pine oil in it at that time. I'd fill spray bottles with it. No diluting it with water either. I used it "straight" from the bottle. It was wonderful as a bug killer. I'd zap every roach I found. It killed them fast. I'd spray the inside of all cabinets, drawers, the doorways, windowsills, all countertops.....you name it, I sprayed it. I'd clean and then rinse countertops, then spray them lightly again before I went to bed so a thin film would dry and remain on them all night long. Needless to say, I eventually had what I think was the only bug-free home in our town. The true test for me was when no bugs were seen when the light was turned on during the night. Cockroaches HATE the smell of pine oil. Made my home smell like a forest so I loved the way it smelled. The scent went well with "flowery" air fresheners too. If you can find pine oil where you are, buy some for your SIL and DD. Breath O'Pine now only has 9% pine oil in it, but that's still more than what other cleaners which purport to be "pine" have. I think you can buy Breath O' Pine online. Hope this post helps.