ds has been in Bumbles (with ME airflow wrap) for nearly 4 months and over the last month or so has had, on and off, a very mild-looking rash under his nappy line at the front. It isn't itchy or raised, just a scattering of pink dots. I haven't changed my detergent (Fairy Non-bio). What do you think it might be? Could he be getting too hot under there?