They don't just use chemicals, quite a lot of components are heated to a minimum of 110 centigrade as well, see https://marsmobile.jpl.nasa.gov/msl/mission/tec

They don't just use chemicals, quite a lot of components are heated to a minimum of 110 centigrade as well, see https://marsmobile.jpl.nasa.gov/msl/mission/technology/insituexploration/planetaryprotection/ https://marsmobile.jpl.nasa.gov/msl/mission/technology/insit...