Abstract: An apparatus is disclosed comprising: a clothes washing machine (30); a detector (33, 44) attached to the washing machine in a location that receives radio frequency (RF) signals that emanate from an interior (48) of the washing machine; and a warning device (35) that receives a signal from the detector to provide an alert when the detector has detected a RF signal from the interior of the washing machine, wherein the radio frequency signals have a frequency in a band designated for mobile phone (40) signals.

Abstract: An apparatus is disclosed comprising: a clothes washing machine (30); a detector (33, 44) attached to the washing machine in a location that receives radio frequency (RF) signals that emanate from an interior (48) of the washing machine; and a warning device (35) that receives a signal from the detector to provide an alert when the detector has detected a RF signal from the interior of the washing machine, wherein the radio frequency signals have a frequency in a band designated for mobile phone (40) signals.

Abstract: A tool for cleaning uneven or periodic corrugated surfaces has a head and a handle which is attached in a similar configuration as for a rake or push broom. The head has a cleaning edge which projects a varying distance, the distance varying according to a period configured to mate with the grooves and ridges of the corrugated surface. The cleaning edge may be solid, bristles or a combination of the two. The tool may have plural cleaning edges for cleaning different areas or types of material. The cleaning tool finds particular applicability in cleaning debris from the corrugated floor of a pickup truck bed liner.