Hazrat Mufti Ebrahim Salejee (Daamat Barakaatuhu) mentioned:
Our whole effort is to get connected with Allah Ta‘ala. However, at times, there are obstructions that come on our path and a type of fog and mist settles on the heart. An easy way to remove this is to make istighfaar twenty times after each salaah, or for two minutes before each salaah. This should be done with true remorse and with a heavy heart.