We all go through periods of low faith. All of us will recognize that our faith wears out over time. We start off so regular in prayers, full of concentration and devotion and then it becomes less and less. We start to look back and think “how was I able to perform so much acts of worship and now I struggle to do just the basics”.
These dua will help, their translation is “Oh Allah revive us in our faith, in our certainty, in our understanding, ” and “Oh Allah enable me to properly remember you and to thank you and to worship you”