Having asked the Lord to remember me, a sinner, and to have mercy on me for being such a poor example of Christianity, ask them if they, when they say they as Jesus into their hearts every day, mean, are they acknowledging the debt they owe to God for Jesus coming in the first place?
Those of us that pray to God in this way so naturally turn for help to God, as does a family member who lives in the same house, greet and talk to 'Dad' when he comes home, that we also invite Him in to sit, and stay a while, in a more deeply felt kind of way.
I often request the Lord's attention to focus particularly upon me as I live the hours of my day, and in the morning, at communion, do it again. And although it might sound like coming to the Lord the first time, He knows I like welcoming Him frequently, or else He would tell me to shut up!
Hopefully this will get into their hearts, for a Christian loves nothing so much as talking God, while one who misunderstands what they are doing may indeed need to ask Jesus into their lives in the permanent way.
Blessings,