Question Detail:
This condition creates in me a feeling of distress and a fear of falling into doubt or even objection. As someone with a beard and body hair, how can I be sure that no dry spot remains on my body with only 3–4 liters of water? Moreover, how is it possible to notice and wash every part completely if there are things like substances stuck to the body or marks such as pen ink?
When performing ghusl, the essential requirement is that the entire body be washed. The expression “even a needlepoint-sized spot” mentioned in some religious manuals should be understood as making a sincere effort to leave no dry areas and to wash the body thoroughly with water.
A person should strive, to the best of their ability, to ensure that water reaches all parts of the body. If, despite this effort, some areas remain dry, they are excused.
Substances such as paint, oil or rust, dough, wax, glue, adhesives, etc., which may adhere to a person’s hands or body due to their profession and cannot be completely removed, as well as dust or mud that may remain under the nails of farmers, do not prevent the validity of wudu or ghusl.