SEATTLE (AP) - About 20,000 Washington residents use alcohol-sensing devices in their motor vehicles. That puts Washington among the top-five states for use of these DUI-prevention devices. Most of those customers come from Washington laws requiring ignition-interlock devices for all SUI offenders who want to drive. And new legislation aimed at boosting enforcement of interlock orders would give the industry an estimated 4,500 more customers per year. Five Washington companies will benefit from that law, which they helped write. Critics say the industry lobbying for favorable laws has helped create a system with loose state oversight.