Assalamu alaykum, I am a Muslim male. During Ramadaan when one is fasting,one has to observe certain rules when performing istinja .If I wash myself thoroughly then I feel that my fast has broken on account of water and my wet finger entering the posterior/anus.On the other hand,if I do not wash myself properly then I do not achieve proper taharat.Please explain me briefly the masail of istinja during fasting so I can avoid waswasa.