New Delhi: Erratic umpiring has been a bane of Indian cricket and as it gets highlighted through the IPL, former international umpire K Hariharan says the standard can improve by having mentors guide the "clueless" officials. "Like the selectors are constantly watching the players from the sidelines, you have to have mentors for umpires who can monitor their performance during the game and point out their positives and negatives right after the game," Hariharan said.