Cleaner shrimp issues

[freezetyle]

I recently bought a cleaner shrimp after reading and reading about how personable they are. i seem to have gotten a really shy shrimp. he has been in my system for about three weeks and all he does is hide in my rock work. I though for the first week or two he would be a little timid and didn't think anything of it but now i would like to see the little bugger. any suggestions aside from switching up my rock work or getting a new/another shrimp?