Answer:
Dry the gauge using a clean towel, move it away from the spillage and allow the gauge to dry naturally for 4-6 hours.
Do not open the case or attempt to accellerate the drying process by applying heat or placing the gauge on a heat source.
If the gauge doesn't operate correctly once dry then you will need to arrange for it to be serviced by a Mecmesin distributor.
Please contact your local distributor to arrange a service and, if the spillage was not water, please advise us of the liquid involved.