I like answer given by Dr Wadhava. Not needed at all. God is there to take care.

You are such a genius. No one has ever thought of such a novel method of looking after the hygiene of the anus. You are a pioneer in this field. But didn't it occur to you that your fingers are only 3 inches. What will happen to the hygiene of your Rectum, sigmoid colon, descending Colon, transverse colon , and so on. Total length is 32 feet.

Take plenty of water Use anometrogyle ointment

You don't have to insert finger inside to clean it.. sit inside warm water for 5 to 10 minutes.. and consume fresh fruits vegetables and plenty of fluids and regular exercise  to have proper motion and clean bowel.

Sit in warm water for 5 min before getting freshen up. Drink more water and take more vegetables and fruits