Use a good quality Neutral Detergent such as Chemspec Neutral Floor Cleaner.
£11 + VAT for 5 litres 1:100 dilution.
This product wont leave any residue on the floor and is tough on grime.
Prochem Alkleen is also a good alternative is there is a lot of sweat/body fat.
DO NOT use abrasive pads on this floor. Soft pads or brushes on a machine are best.
Apply the product, allow some dwell time, remove slurry and rinse with fresh water to give best possible results.
