Try one of those computer keyboard vaccums. They have tiny nozzles and bendable tips.
If nothing seems to work, contact your doctor's office or emergency room. It's possible to have this cast cut off, and another cast put on.
The cast of George Sand - 1958 includes: Maria Fernanda as George Sand
The cast of Sand - 1971 includes: Valentin Jeker as Carl-Ludwig Sand Peter Kaufmann as Reisender
The cast of Sand Temple - 2013 includes: Raj Nili
The cast of Sand Country - 2003 includes: Rick DeLeon
The cast of Sand - 1998 includes: Patric Poggenpohl as Young man
The cast of Sand Castles - 2010 includes: Chris Rehmann as Bob
The cast of Sand Brothers - 2012 includes: Dan Kastoriano as Tuvia
The cast of Sand and Lightning - 1986 includes: Michael Tobias as Host
The cast of Love and Sand - 1929 includes: Arthur Lake as Horace
three (3) sand- cast-le (sounds like sand-car-sol)
The cast of Sun Sand Survival - 2012 includes: Fernando Ramallo
The cast of Riders of the Sand Storm - 1925 includes: Lorraine Eason