I have a Macbook which when home I use as a desktop using an external monitor and keyboard. The keyboard is the standard Apple aluminium wired keyboard. Today the comma key stopped working. Reading on the internet tells me there is a sealed switch (not sure if that is the right words) under the key so it is unlikely that dust has interfered with it, and the best suggestion I found seemed to be that the membrane and switch have become slightly depressed. The answer suggested is to lift up the key and put some thin packing inside. Before I did anything so drastic I wanted to ask for some advice please. I seem to have the following options: Buy a new keyboard That is the sure option. But we have some people in our house with severe chemical sensitivities and Apple plastics give off a gas that they are sensitive to. It took months for my previous keyboard to off-gas enough in an unused room before I could use it (and my wife's recent expensive Macbook Pro has been in the same room for 2 months so far unable to be used for the same reason - we pay a heavy price to use Macs!). So that's not an attractive option. Are there Apple compatible keyboards by third party manufacturers that have the correct key configuration? Use a function key I can sort of work around it e.g. at the moment I have cut and pasted a comma into a TextEdit file and I just paste that in when I need it - annoying but it works. So that makes me wonder: is it possible to reconfigure a function key as the comma/less than key? Try the repair I could try what I've seen on the web and put some thin packing under the key. Does anyone think this could be the problem and thus recommend this action? Alternatively, does anyone think it could be solved by buying a new key on the web? I would really appreciate anyone's thoughts. Thanks.