There is a smidge of thermal paste stuck in the cpu socket, however it is zinc based and non conductive so there’s no chance of short circuiting or damage and your welcome to clean it out with a tiny bit of rubbing alcohol.
MSI MAG Z790 TOMAHAWK WIFI LGA 1700 Intel Z790 SATA 6Gb/s DDR5 ATX Motherboard
FOR MSI MAG Z790 TOMAHAWK MAX WIFI Motherboard LGA 1700 Intel Z790 DDR5 ATX
(Factory Refurbished) MSI MAG Z790 TOMAHAWK MAX WIFI DDR5 Intel ATX Motherboard
(Factory Refurbished) MSI MAG Z790 TOMAHAWK WIFI LGA 1700 DDR5 ATX Motherboard
MSI MAG Z790 Tomahawk WiFi Gaming Motherboard LGA 1700, DDR5, USB 3.2 Gen2, ATX