Essential Knowledge​
Taking bath with rainy water is a spiritual therapy for spiritual attack of any kind; be it socery, evil eye etc. And the evidence that rainy water i[color=#006600][/color]s a ballistic missile attack on evil spirits is Allâh's verse which goes thus:

​وَيُنَزِّلُ عَلَيْكُم مِّنَ السَّمَاءِ مَاءً لِّيُطَهِّرَكُم بِهِ وَيُذْهِبَ عَنكُمْ رِجْزَ الشَّيْطَانِ وَلِيَرْبِطَ عَلَىٰ قُلُوبِكُمْ وَيُثَبِّتَ بِهِ الْأَقْدَامَ​

​...and He caused water (rain) to descend on you from the sky, to clean you thereby and to remove from you the Rijz (whispering, evil-suggestions, etc.) of Shaitan (Satan), and to strengthen your hearts, and make your feet firm thereby.​
(English - Mohsin Khan) Surah: Al-Anfãl vs 11
Glory-be-to-Allâh! [b][/b][i][/i]