I've got a shower stall that's due for some grout repair and re-caulk. The 4X4 tile is still in good shape. It's a straightforward deal, but I'm getting up in my years and it's something I'm going to farm out. There's a few specialist places that I've come across in the paper that do this. Grout medic, grout Doctor, etc. Just looking for feedback on using a company like that.