To rid the substrate of any living organisms that may potentially harm the millipede. I've heard this is a good idea. Seeing as how this is my first millipede however, any advice or thoughts on the matter are quite welcome. I read that this is a good idea though (baking the substrate) on a reliable website (http://www.geocities.com/millipedes_uk/). Go to "Keeping Millipedes" and then the sixth paragraph under "Equipment" mentions this technique. Thanks!Steffen said:Why would you do any of those things?