Williams said a couple of contract variations are being priced to remedy the situation. “We are having issues with ventilation and Burton are going to price putting in additional grills near the top of the cubicles,” he said. “We are also having some issues with the toilet flush units which are being looked at. “They are very economic cisterns but they don t actually flush enough water down to clear the toilets. On one hand we have been trying to save water but we can t in these types of toilets. “It should be [an easy fix] except there is no commercial off-the-shelf product to be able to do that, we actually need to disable the half flush button.”