If you neglected your strainer, you should put it in the soapy water overnight. Under running water, turn the sieve upside down after it has been soaked. If you have a dishwasher, you can use it at this point, but keep in mind that larger food bits from other dishes can get lodged in the sieve.
Let's Get It Fixed!
HomeX virtual experts will assess your issue (for free!) and can resolve simple problems.