jumbled numbers on keyboard

[DefinitelySaf]

i been using the marvo KG935 for a while now and suddenly the number keys got mixed up (not the numpad). For example when i press number 2 it comes out as 6, 3 as 7, 4 as 8 and so on. Please somebody help and thanks! (sorry for bad english)

 

[MDTOP]

I've only seen this when there was water in the keyboard.
Best bet would be to get some alcohol, q-tips, and a small screwdriver/kitchen knife.
Lift 1 or two keys off by carefully prying around the key.
When off use the q-tip to clean around/under where the key was. Do this a little over 100 times and see what happens. When you master this and have a good memory, go ahead and lift several keys at the same time.