Unfortunately, running the carb dry is not only insufficient but the surfaces are already coated and it does less good then making sure you use the correct ethanol additives. The enemy is time…run the equipment regularly enough so that fresh gas must be added. The problem with running dry carbs is that many of the plastic and rubber parts are designed to be used with gasoline and dry out without it. Nothing beats regular use.
One definite way is to replace the last fuel used with “Trufuel” or the like which I do with the generator which must start when I need it but can still be left for over a year.