Fine mesh strainers can be a pain to clean, especially if you are using them with thick or sticky wet foods. The best way to care for a fine mesh sieve is to clean it the second you're done using it. Shake off the excess flour or other dry ingredients into the sink or your trash bin. Run the sieve under hot water, rinsing both sides well, and then wash it as you would any other kitchen implement with hot water and mild dish soap. To clean wet foods from your sieve, turn it face-down in the sink and run hot water over it. Loosen the food with a sponge and then turn the sieve over and wash the inside of its bowl. Air dry or wipe the sieve dry with a clean dish towel. Use a soft plastic brush to get at stubborn particles and then rinse the sieve thoroughly.