thanks
Babs,
I would use a hand pump garden sprayer and a harris pole and some 5mm clear tubing.
easy to do, drill hole at top of harris tubing and the bottom thread hose through the hoses, take the wands solid tube off the pump sprayer and the spray head and attach the tube, tape the spray nozzle to the end of the harris pole attach this back to 5mm tube.
You now have a telescopic sprayer that will reach all standard houses

Ian