How might data be collected for this target response?If data are insufficient, it sounds like permanent product data is not complete. Focus here should be permanent product data
Identify several interventions that might help improve response rates. Place them in order with the least-restrictive at the top so that the interventions may be introduced systematically, adding more restrictive / less favorable interventions after the outcomes of less restrictive options have been measured.

Focus on permanent product data. Use reinforcement to motivate staff to collect data.
Have supervisor monitor daily to ensure data is being completed, use BST to provide performance feedback
Possibly use a performance improvement plan to increase data collection