Where have all the Nessies gone?

The Loch Ness monster, whatever you think he/she/they/it may be, has been a pretty consistent sight in its home lake for the past 80 years.  Gary Campbell, a local enthusiast who keeps a register, says no one has seen Nessie in 18 months. William Hill, the bookmaking firm that offers a cash prize for best Nessie sighting of the year, records three claims, but all were dismissed as easily explained. 
Nessie sightings before the 1930s were separated by many years, and some items put into this category were irrelevant (e.g., St. Columba's supposed dismissal of a monster in the River Ness), while others were poorly supported or fraudulent.  Still, there have been over a thousand sightings by Campbell's records, most recently in 2012. Campbell hopes 2014 will be a better year.  In other news, American television loon Charlie Sheen says he's going to look for himself. 
Good luck, Charlie. I've given up believing there's a large unknown creature in the Loch, but given Sheen's well-publicized  pharmaceutical habits, he might see one anyway.

ADDED: Dick Raynor, a highly competent investigator,  sent along a reminder that he regularly posts Nessie news here.