How to get rid of pigeons

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PIGNX BIO-REPELLENT BIRD GEL: The World's Only EPA-Registered & NSF-Certified Bird Repellent
PIGNX BIO-REPELLENT BIRD GEL is an EPA-Registered, US-Patented, NSF-Certified, all-weather contact repellent that has been proven to deter pigeons from roosting on buildings, ledges, skylights, signs, billboards, A/C units, balconies & other structures. Our gel’s superior durability and adhesion allows application on almost any surface and in EVERY climate no matter how hot, cold, wet or dusty. It is available in convenient "ready-to-use" disposable dishes, 10-ounce caulking tubes, and economy 5-gallon buckets.
You may check the website www.detourgel.com for more info