C1 is a memory error, but since you got the NB Wet it could be erroring like that due to the NB being shorted out?
C1 Detect memory, Auto-detection of DRAM size, type and ECC, Auto-detection of L2 cache
You can wash a motherboard in the shower anytime you want and it will survive, you just MUST make sure it's 100% totally dry before applying an electrical charge to it. So if you did not let it fully dry for a few days or under a low heat lamp or fan, then you may have damaged it when you tried to turn it back on if it was still wet in any way.
Hopefully you can either clean it off more, and dry it again, or just let it dry out longer and then maybe it will work!