To increase the rate at which salt dissolves in water, you can take the following actions:

Dr Max Leman thank you for your contribution to the discussion

Stirring is important because it helps to keep the water temperature constant throughout the volume. Without stirring, there could be zones of different temperatures. The thermometer can be in only one place. Stirring allows the entire volume to be one zone. A common misconception about dissolving is that heating and/or stirring are required for the dissolving process to occur. In this study, quantitative experimental evidence was collected and analyzed to demonstrate that neither heating nor stirring is required for dissolving. In the absence of stirring, the concentration of solute will be highest, close to the pieces of solute, so more solute won't dissolve into the solution until the dissolved solute has been transported away by diffusion. The stirring allows fresh solvent molecules to continually be in contact with the solute. If it is not stirred, then the water right at the surface of the solute becomes saturated with dissolved sugar molecules, meaning that it is more difficult for additional solute to dissolve. Solubility is affected by 4 factors temperature, pressure, polarity, and molecular size. Solubility increases with temperature for most solids dissolved in liquid water. This is because higher temperatures increase the vibration or kinetic energy of the solute molecules. If we stir the solution for only a short amount of time, we will cause only a few more solute–solvent interactions. However, if we stir the solution for a longer amount of time, more and more particle interactions between solute and solvent will occur, which will speed up the rate of dissolution. Constant stirring increases the rate of dissolution, because stirring changes the particular solvent molecules that are in contact with undissolved solute. Because the solubility of solids and liquids generally increases with temperature, solids and liquids are often dissolved in warm solvents. Stirring will help cool a hot drink because it speeds up the process of convection by bringing the hottest liquid at the bottom to the top, where it can be cooled by the air. But in truth, convection occurs pretty quickly anyway, and you're only slightly speeding it up.