Best practices for speaker cabinet care

I have some black veneered b&w's -- cdm9nt -- never occurred to me to consider using some sort of wood cabinet conditioner on them -- i just have dusted them off over the years - and they seem to be 'fine'... but I saw a post about speaker cabinet care - using various brands of conditioner -- and started to think -- have I 'not' been doing what I should have been doing ... 

So - question -- what wood conditioners should I be using on my cabinets to ensure they are being cared for ?