Question Summary
If I pass my wet hands over a dry spot on my arms left after washing, does this suffice for the washing?
Answer
In the Name of Allah, the Most Merciful and Compassionate
It is a condition for washing any limb to validate that flowing water contacts every part of that limb. [Shurunbulali, Maraqi al -Falah]
One can use their hand to guide the flowing water to each part of the hand, emphasizing sunna in the Wudu. [Shurunbulali, Maraqi al -Falah]
If you realize a dry spot on one of your limbs during wudu, merely take some new water and wash that part.
Hope this helps
Allah knows best
[Shaykh] Yusuf Weltch
Checked and Approved by Shaykh Faraz Rabbani