I have been having a clear out and re-discovered 2 old hard drives that were replaced with SSD's a good while back. What is the best way of destroying them just in case they should fall into the wrong hands, there is quite a bit of information on both which should be made unreadable.. One is from a laptop and the other a desk top. When I had a wood burner I used to pop them onto the logs for an hour or so but now totally centrally heated I don't have the option