{TV}Why did Seo In Guk shock viewers just by washing strawberries on ‘I Live Alone’?

Seo In Guk‘s method for washing strawberries is becoming a hot issue.
On the March 29th broadcast of MBC‘s ‘I Live Alone,’ the stars showed their unique ways of greeting the Spring season.
The episode aired Seo In Guk washing strawberries for a snack. The viewers were shocked when Seo In Guk just filled the plastic box of strawberries with water, shook it, and poured the water out, completing the wash.
Upon seeing his method of washing strawberries, the other guest stars asked him, “Wait, that’s washing it?“, and Seo In Guk casually answered, “Isn’t it ok just to wash it in flowing water?”
The viewers responded, “That is not ok“, and “I was shocked at Seo In Guk washing strawberries.”
The washing starts at about 30:44