NASA adheres to planetary protection procedures and requirements. For MSL...
"Selected components were heated to temperatures
ranging from 110 to 146 degrees Celsius (230 to
295 degrees Fahrenheit) for durations up to 144
hours. Tools and other equipment that could come
into contact with rover hardware were also cleaned
routinely with alcohol wipes."
"Selected components were heated to temperatures ranging from 110 to 146 degrees Celsius (230 to 295 degrees Fahrenheit) for durations up to 144 hours. Tools and other equipment that could come into contact with rover hardware were also cleaned routinely with alcohol wipes."
More details here: http://mars.jpl.nasa.gov/msl/news/pdfs/MSL_Plan_Prot_FactShe...