Wait untill the ambient air tempreture rises enough to melt the ice.
If the temp is 0c or below, you should not fly as you are in icing conditions. Simple as that!
Ice doesn't melt in a hurry even when the temp is way above 0 degrees. You have to have moisture to form ice else all our little aircraft would be hurtling earthwards when the OAT was below zero. Today that would have been at less than 1000 feet. Everyone was flying today - no one came to grief!
Too much Champagne me thinks, mate.