"If it does not work at least the steps will be cleaned" he said.
No group has yet claimed responsibility but the Islamic State has stepped up attacks against Christians in Egypt.
Local law enforcement received a bulletin saying there were no known specific threats.
Lethebo Rabalago has been pictured spraying his followers with pesticide, claiming to "heal" their diseases.
Under new Church of England guidelines, 10,000 church spires could be used to provide superfast broadband to more areas in rural England.