Hello, and welcome to CF.
It usually comes down to how you define "sin".
Those who consider only gross, intentional sin - lying, stealing, hurting others, gossip, etc. and maybe even extending to such things as dwelling for a moment in coveting - will usually say yes. We should become purified and avoid those types of sin.
But the real definition of sin/hamartia is "missing the mark" and that mark is Christ Himself.
Do we measure up to Christ's own purity of heart? Do we always at every minute of the day and night love God with ALL of our heart, soul, strength, and mind? Are we so free of the vice of pride that we feel not even a momentary flash of offense when our "rights" are violated in some way (I'm talking about someone cutting you off in traffic or moving ahead of you in line, not an actual social injustice where human rights should be championed). And so on. If we are sensitive enough to the holiness of God, we will recognize that we are plagued frequently by sinful thoughts and inclinations, though hopefully our outward deeds and words can become to a degree sanctified.