DS has terrible nappy rash for the first time ever. He is 8 months and I'm changing him every 2.5 - 3 hours or so because he is pooing each time. He was screaming and clenching this evening when I was cleaning him . I let him go nappy free for about 10 minutes and will continue this during the day. We use washables but as I say this has never before been an issue. He is also teething. Please help, what can I put on it, has anyone any tips?