ERP 9 Dashboard filter

I have a dashboard with three queries. I publish the PartNum in the top query, which has a tracker for PN, then filter by PartNum in the lower queries. But if one of the bottom queries has focus and they refresh, it takes a long time because the filter is not there. Is there any way I can cause the lower queries to ONLY refresh if there is a PartNum entered in the tracker?

Where are you entering the filter for the subscribers? On the Query or the grid?