After purchasing the fiberglass rod from Willy's Fish Shop, simply get the bait and your fiberglass rod in your inventory. Left click on the stack of bait (or right click if you only want to load your rod with a single piece of bait) and then right click on the fishing rod. The rod will automatically use the bait until it's completely gone each time you cast your Another type of bait was added with the 1.5 update, as well. this is Magic Bait, and you can purchase it from Qi's Walnut Room on Gin...