A Problem Related to Ablution Discharge of Madhi usually happens at unpredictable and the most inconvenient times and one is never sure whether it actually did discharge or not.
Most bathrooms are barely clean to allow urination in standing position.
When not home, I use dry tissue paper to clean the organ tip before wudhu and say my Sala h . This is Iztarar . Allah SWT will InshaAllah overlook this imperfection of taharah , forgive me and accept my Sala h . Obviously if I am wrong, then offering fardh Sala h is InshaAllah SWT more important than any other concerns. Furthermore, the natural agent for such cleaning is water.