The biggest mistake newcomers make with grandpa style tea is draining the glass dry before refilling it. Doing this forces you to restart the infusion from scratch with water-logged leaves, producing a thin, watery brew.
Mastering this technique comes down to the one-third refill rule. Sip your tea down until roughly one-third of the liquid remains in the mug. At that point, head to the kettle and refill the vessel to the brim with hot water. The remaining concentrated liquid flavors the fresh water immediately, while the fresh hot water coaxes new aromatics from the resting leaves. This continuous dilution cycle creates a smooth, uninterrupted progression of flavor that stays balanced from morning to late afternoon.
