Hello there, Thank you for reaching out and sharing your experience. We understand how frustrating it can be when a microwave does not keep the correct time, heats slowly, and shows fingerprint marks, and we’re ready to help guide you through the appropriate steps. For the issue with setting and maintaining the correct time, please follow the instructions in the user manual on page 14 under the topic Set Time. For concerns related to the microwave running slow or weak heating, please refer to page 36 of the user manual under the topic Heating is weak or slow, and follow the guidance provided. For maintaining the unit and addressing fingerprint marks on the surface, please follow the instructions on page 32 under the topic Cleaning and maintaining your microwave oven. User manual https://downloadcenter.samsung.com/content/UM/202502/20250214160226972/O_01._IB_FULL_ME7500D_GOOD_ME21DG6300SR_AA_AC_EN.pdf Should you need further assistance after reviewing these sections, please get in touch with us so our team can review your situation and provide support. You may reach us at the following channels: 1. Facebook Messenger: http://m.me/samsungsupport 2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513 3. Samsung Community: https://us.commuity.samsung.com/t5/Samsung-Community/ct-p/us When you message us, please provide this reference number (1152003079), so our team can pull up your information. Thank you! ^Joshua

Greetings, We want to provide you with a hassle-free experience using your microwave. Let us help you. Please refer to the microwave's user manual for instructions on how to set up and operate your unit: https://downloadcenter.samsung.com/content/UM/202502/20250214160226972/O_01._IB_FULL_ME7500D_GOOD_ME21DG6300SR_AA_AC_EN.pdf Should you ever need more assistance, please feel free to get back to us via the following options: 1. Facebook Messenger: http://m.me/samsungsupport 2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513 3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us Please include reference number 1151186767 in your message so our team can locate your information. Have a great day. -John