The ruling on wudu' when there is something on the hand that prevents water from reaching the skin!!
Machine translationRead the Arabic original
Answer : If there are things on the hand that prevent water from reaching the limbs that must be purified, then it is obligatory for you to calculate the time and to proceed to remove this barrier until the time arrives and it has been removed and you have performed a valid wudu'.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، لقاء[6 من 20] حكم الوضوء وعلى اليد شيء يمنع وصول الماء إلى البشرة!! ابن عثيمين - مشروع كبار العلماء — youtube.com
The Arabic text is a machine transcription of the audio recording.