In a skillet melt butter. Once melted, add garlic and saute for few seconds. To it add flour and stir it around until cooked for a min or two. No add milk and stir until it's mixed. To it add water and bring to a boil and simmer until thick. Now turn of the gas and add cheese, salsa and salt. Turn on the gas on medium low and stir until you have a thick cheesy dip. Taste and adjust.
Recipe by Naive Cook Cooks at https://www.naivecookcooks.com/easy-picante-cheese-dip/