We will have both Bayer Insecticide and Revive  Coral Cleaner available at the meeting if you don't already have these.   Below are instructions for there use.
ReVive: (from the label):
Directions:  Mix 4 capfuls of Revive per gallon of clean, aged seawater   at room temperature in a bucket or other container suitable for bathing   the coral.  Bathe coral in this mixture for at least a few minutes, up   to 15 minutes, while gently swirling it or using an air stone for   agitation.  After the bath, remove coral from the mixture and place it   in a saltwater aquarium with moderate water flow.  The mix may be   discarded, or it may be used for cleaning other corals.  Discard the   used mix after 1 hour. 
* note * I generally rinse in clean (untreated) tank water before returning to my tank.
Bayer Insecticide: (this is more of a home remedy that has been used in the hobby for quite some time)
I'm going to provide links from a couple sources as I take no  responsibility for its use, or dose (and I'm sure neither does Bayer)
Cherry Corals: http://www.cherrycorals.com/news/coraldips/
Murfreesboro Aquatics: 
http://boroaquatics.com/blogs/articles/17033867-proper-dipping-of-corals-the-bayer-method