Answer
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
If removing impurity after relieving oneself from the place of exit of the two passages, from urine and feces with water is difficult, then it can be done with other pure liquids that remove filth.
Answering your question, The Assembly of Muslim Jurists of America, states:
The removal of impurity after relieving oneself from the place of exit of the two passages, from urine and feces, is done by Istinja with water or by Istijmar with a dry, pure substance, such as toilet paper. If Istinja with water is difficult, then it can be done with other pure liquids that remove filth.
The default rule for purifying impurities from clothing or the body is to use pure water. However, there is no harm in removing them with any pure liquid that can achieve this, such as vinegar, rose water, and the like, as long as it is pure in itself and removes the essence of the impurity.
It is preferable to use water to avoid any difference of opinion.
One should not remove impurities with something edible or to wash the hand with it unless there is a need, meaning that there is nothing else available, or it is stronger or faster in effect for removal than other substances.
Read also:
Finding Impurity on Clothes While Praying
Is Prayer in a State of Impurity Valid?
Forbidden Acts for Those in State of Major Impurity
Almighty Allah knows best.
Source: AMJA Online