I must advise against putting Drano or any other drain-cleaning products in a washing machine. Drano is designed to dissolve clogs and clear drains in plumbing systems, and it should not be used inside a washing machine or any other appliance.
If you're experiencing drainage issues with your washing machine, it's best to troubleshoot the problem by checking the lint trap, hoses, and connections for any blockages or kinks. You can also run an empty cycle with hot water and a cup of white vinegar to help clean the machine and remove any residue.
If the issue persists, it's recommended to contact a professional appliance repair service or the manufacturer for assistance. Putting Drano or similar products in the washing machine can damage the machine, and it may also pose a risk to your health and safety. Always follow the manufacturer's guidelines and recommendations for maintaining and troubleshooting your appliances.