Issuing Material with scanner

We are trying to set it up so shop users can scan the job pick list in the issue material screen to issue material. Running into a little problem with the warehouse combobox. When we scan the warehouse code, it does not pick up the correct warehouse (there are 7). Anyone have a clever workaround for this? I thought about replacing the dropdown with just a textbox, and binding it to the field the combobox is, but the user will only be able to see the warehouse code.