I've just about had enough of my yellow tombstones staring back at me from photos so am looking for any recommendations for home whitening kits or machines. I've tried the toothpastes and boots whitening kit but am now ready to invest serious (well not that serius) cash on a machine you can use at home. Next have one - does anybody have any thing they've used that has worked. I do like a nice glass of red wine so needs to be a good one