Deflate the lid slightly in order to restore it to the correct level. Similar to your inflatable liner the air inside the lid will fluctuate depending on the ambient air temperature.
Please note the air will expand during warm weather and decrease during cold nights.
On occasion, the internal welds can separate. This may cause the lid to become deformed or balloon in a particular area. If this is the case please contact our Customer Care team below so we may provide some further assistance.