Wonderful practical information. As a nurse, it is great to the reinforcement of 'cool' or 'warm' water for hand washing. Here's my question for hand care: I've been told by an arborist that I should not pull certain noxious weeds bear-handed, without wearing gloves, because some weeds (e.g. knapweed) may have oozing residues of chemicals that are toxic and can be absorbed through the skin. He has heard that bone cancer is one of the increased risk factors. Your thoughts?