The guarantee will cease to apply when the bed is older than 10 years or if Hypnos finds that during the guarantee period any one of the following has occurred: (1) The product is found to have been mistreated or damaged; (2) The product has not been maintained in accordance with the care instructions supplied - this includes mattresses not being turned or rotated as recommended; (3) A new mattress has been used with an old or damaged divan or bedstead that is deemed to be of unsuitable quality; (4) The mattress has been used on a slatted support system within a bedstead with slats more than 3 inches (7.5cm) apart.