Despite taking as many precautions as possible (keeping windows and doors shut, food always sealed in plastic containers, limiting standing water, regular vacuuming, very little left on floors), we seem to have developed a small roach problem that I would like to knock on the head before it becomes a big roach problem. 

Can anyone recommend the best course of action to proceed? Spraying? Traps? Both? We've got the big red cans of spray from Mercadona, but I'm considering traps, too. H