I asked at my local hardware so when I moved in to this house as it's all laminate. They sold me a flat microfibre mop thing because it needs very little water or cleaning products both of which damage laminate. It's important not to use a lot of water or the laminate swells up.
You are meant to clean it with something like this mop.
I.e. no hot water or anything that gets it very wet. However, I do use my steam cleaner on mine. But it is old and it's being replaced at some point so I am more gung ho with it than I will be with my new laminate.
sweep, and then mop....very hot water, teeny squoosh of washing up liquid and a generous squoosh of zoflora why the christmas smell one, of course really wring out the mop and then go over with a dry one....one of those flat shaggy vileda/fakey vileda ones.
Recently I got a professional end of tenancy cleaning in Fulham to please my landlord and get my deposit back. Floors were all laminate. I really like what they did with them, I've never seen them so shiny. Oh well, it might have been the technique, but I'm considering buying their product if possible. I confirm that no water was used in the process.