A good way is to tell them that you have geese, not ducks and ask if they can clean your backyard and roof.

These a****oles call me as well in their fake p*** voices...No Call List is crap..Hope they call again because I have a plan....

They are rude , inconsiderate bunch of morons. They call my house everyday at 8:30- 9:00. Im on the no call list and have a newborn sleeping. Even when i say nicely `no thanks and please stop calling me`` they just say nothing , hang up on me and still call the next day. Im going to look into this matter futher and hopefully get no more calls and this company shut down , bucnh of morons!

download google chat , this is free call and you can call them hundred times from your computer. Your number will be listed as a California  resident. Let's make even with those CROOKS.

When these people call about cleaning my ducts I reply that we don't have ducks or geese for that matter.  Usually gets a pause and silence from them.  I will have to try the quacking next time that someone suggested in a previous note.  I thought that was cute.