Is this common knowledge? That using fabric conditioner can increase flammability? I probably always use more than the recommended dose of conditioner but it seems even the correct dose could be problematic as the small print advises against using on sleepwear. Pretty much everything my baby wears is sleepwear, at some stage or another. My 9 year old has clearly survived my carelessness up until now, but I have to admit this is going to become one of those things I worry about unreasonably now.