Lying fiancé

I keep catching my fiancé in little lies. I confronted him and he swore he wouldn’t do it anymore. Well, I suspected something was up and I checked his phone while he was in the shower. I caught him in 2 lies. Do I confront him even though I went through his phone behind his back or do I sit on it and wait for him to screw up again? I’m so sick of the lying. It’s not about cheating or him being with other people but about things like getting money from his parents without telling me or not coming home directly after work.