JavaFX: my tooltip is not showing up and I'm not sure why

Question

I want to add a tooltip to a TableColumn but for some reason, it is not showing up even though it seems as if my implementation is correct. What is wrong with my implementation. I got the tooltip to show up once after my mouse was on the spot for 3 minutes but how can I get the tooltip to show immediately instead of waiting a long time for a long while?

    //Name Column
        TableColumn<AuctionItem, String> itemNameCol = new TableColumn<>();
        Label nameLabel = new Label("Items");
        nameLabel.setTooltip(new Tooltip("This gives the name of the product"));
        itemNameCol.setGraphic(nameLabel);