Start by diluting 25-50ml of Treatex Floor Care in 5 litres of water.
Then mop the surface with the solution, ensuring that the mop is only damp and not sopping wet. You can also use a slow buffing machine with a white pad.
To avoid swelling, never allow the wood to remain damp or wet for a long length of time. If you have an intensive stain, increase the strength of the wood stain remover to a maximum ratio of 100ml per litre of water.