Pigeon Problem Phoenix SFR

[Dave G.]

Anyone have suggestions for pigeon deterrents? I have a Phoenix property where, due to the next door neighbor putting up some kind of bird feeder, we have a flock of pigeons that now circle the area and spend enough time on my roof to crap all over the place. I've tried hanging flashy CDs from the gutters and the Bird-B-Gone fake hawk. The pigeons don't care about either of those things. This is a 2-level and I'm not big on heights, so if something like spikes needs to be installed on the crown of the roof where they always land) then I'd need to hire someone. 

Any suggestions are appreciated.