Sorry, RTA:
The scientist tell us they ran out of water, therefore could not produce a slurry using clay.
The writing instruments produced with this technique (today we call them crayons) were at an all time shortage, stopping the production of a 'calendar'
The dissolution caused widespread panic, they did build some of the best music festival venues ever - just look at the Ballcourt in Tikal (could you imagine the speaker stacks (Drum stands) in that place!) When will the 2013 music festival, they asked.
At some point, depression set in because they may never see 7/7/2077 (Mayan numerals people, please keep up = laying down, laying down, standing up, looking lower, twins laying down) which was meant to be the the be all of all music festivals.
That was it, Mayans over - the current model of Maykia phone they had created could not keep up since the they used exactly 365 days for calender. People missed birthdays, dates (with girls) and funerals.
Society crumbled.