Unfortunately once cupping occurs in laminate flooring, the flooring will need to be replaced.

This is caused by water either by too much used when cleaning or spillage.

I have had a few jobs where this has happened and we have tried to dry the area out with the use of heaters only to find the moisture was being retained under the flooring.

When the flooring is laid the installers use a polythene barrier between the concrete and the boards and this is where the moisture gets trapped.

When cleaning laminate flooring only use a damp sponge and definitely not a wet one.