Does regular machine washing remove semen stains?
Yes. Men performing the test will not detect their own semen from previous sexual activity on any underwear that has been washed. Do I really need 5 tests CheckMate is made to be the most accurate, easy to use test kit ever created. The reason the Infidelity Test Kit is designed to perform 5 or more tests is so that users can instantly verify their own results by testing other substances such as stains that are “known” to be dried semen along with items that are known to not be semen, such as urine, saliva, or normal vaginal secretions.