I'm having the same problem Colleen was having. I finished applying grout 5 days ago on my kitchen backsplash and it is really caked on behind the sink (which also happens to be a hard-to-get-to spot). I used Hydroment sanded ceramic tile grout and ceramic tiles (with a matte finish). I've been working on getting the excess grout off for days...Any suggestions would be greatly appreciated!
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