I read on https://en.wikipedia.org/wiki/Shiva_Puja that -
Fingers should not be put in water, milk and ghee etc., because the touching of nails makes these things inauspicious.
But when I offer curd and ghee in Abhishek with just a spoon, without touching the offering with my hand, the consistency of the substances makes them pile up at the top without properly flowing down the shivling. The result is a mound of offering on the top and none of it spread uniformly. So can I massage the shivling by hand while doing Abhishek to smoothen out the offerings? It can be compared to bathing a child with soap, or applying some herbal unguent on their body, for their own benefit. We don't just squeeze the lotion out, we rub it onto their skin for a good distribution. Is this allowed with the shivling?