Firstly, it's always a good idea to consult the manual in terms of maintenance as you don't want to do something that may invalidate your warranty. For cleaning and maintenance, white vinegar is your friend. This can, when in a solution with water, break down mineral deposits. You can apply this to the soleplate and use a Q-tip for the holes. For deep cleaning, you can run this same solution through the iron before refilling it with normal water.