I found that it was great to wash my floors with hot water and vinegar and then my counters with vinegar. I then sprinkle the counter (where they walk across on their way to the sink), with baking soda. Apparently it is like walking on glass for them. I did add the dome baits and sprayed the outside of the house. I try not to leave anything in the sink and with all of this, was able to rid them. Preventative spraying in the spring helps before they come in. I find them more prevalent in rainier springs.