Nonsense, a RAM upgrade will never brick a motherboard. The most likely cause would be ESD damage, but the RAM itself won’t even break a motherboard. A miniscule drop of sweat also sounds very unlikely to break anything. I’ve never broken RAM or a motherboard in 22 years of computer building.
Use ESD protection and reasonable precautions (don’t wear wool, don’t work on carpet etc) and it’ll be fine.