For 6 years now we have suffered from Pigeons roosting on our Television Aerial which is positioned just above a newly constructed Conservatory. The problem that comes with roosting pigeons is a large amount of pigeon waste. This waste was being launched from the TV aerial onto the conservatory roof then across onto our kitchen windows. Thankfully this is now a thing of the past due to the very effective and safe pigeon deterrent. Using the polycarbonate spikes these are both safe to the pigeons and does not affect the TV reception . Only problem now is the pigeons no longer roost with us but have moved to our neighbours….maybe another order on the way.