CLEVELAND (AP) — The Cuyahoga County sheriff is at a loss to explain why it’s so hard to find qualified corrections officers to staff the troubled jail. reports that the number of corrections officers working at the jail is down again and ticking up in the first half of the year.

The county counts 608 corrections officers, including six who are on leave because they face criminal charges.

That’s well short of the 675 that Sheriff Cliff Pinkney has said would be needed to end the practice of locking inmates in their cells for long periods due to short-staffing.

The lockdowns were identified by the U.S. Marshals Service as one of many problems at the downtown jail.

The county is trying various measures to recruit candidates, including a hike in starting pay.