Any budding photographers know if and where internal cleaning of lenses can be done-believe it might be somewhat specialist. Have a few good quality lenses that have got tiny fungal growth on inside of lens. Looked at Fairs cameras website and they don't mention it.
I think it's a lost cause. Fungal growth used to happen occasionally in the Canada balsam which used to be used to join lens elements together. As far as I remember from many years ago, nothing could be done about it.