When mixing cement-based tile adhesive, clean water or the recommended liquid component should be measured and poured into a clean mixing bucket according to the manufacturer's recommended water-to-cement ratio. Then, pour the tile adhesive powder into the mixing bucket and mix thoroughly with an electric mixer until uniform and free of lumps. Alternatively, follow the mixing instructions provided by the manufacturer. It is strictly prohibited to continue using tile adhesive that has lost workability or is nearing setting by re-mixing it with water after the recommended usable time.