jQuery Grid Plugin - jqGrid

Hoping someone can help me with this one. I have a grid up with the add/edit buttons...yadayada.

I had the need to add a new custom button that launches a custom modal to enter data into a relational table that helps feed a search drop down as well as a dropdown in the default add modal. My issue comes in to after I call the update and get my JSON result, I need to fully refresh my grid (bc I now have new entries for my search and add dropdown). I have searched and tried $("#MyGrid").trigger("reloadGrid") and although it does appear to refresh the grid, I can tell its doing it from a cache because the new items in the db are not propegated up to the dropdowns. If I F5 the page, they are there.

Anyone know how to do a complete refresh of the data?

Thanks,

Travis