My griptape is dirty! ...Is there a way to clean it?

Heyyyy,
It started when out on my longboard,i met a couple of my mates and one of them asked for a ride on my longboard which i couldn't really say no to, But when i got it back, it was covered in Mud !!
.......I have been trying for ages to get it off, but nothing seems to work, and i cant use water because that will wreck the griptape even more.
So has anyone got any suggestions on what to do?......or do i have to buy more griptape?
It started when out on my longboard,i met a couple of my mates and one of them asked for a ride on my longboard which i couldn't really say no to, But when i got it back, it was covered in Mud !!

So has anyone got any suggestions on what to do?......or do i have to buy more griptape?
