Some of the grout between the tiles had worn away, especially in the kitchen. One area, there was actually no grout left. I decided to regrout since I do mosaics and figured it would be just like doing them.
I got advice from an associate in our local Lowe's and got started. It was not hard at all.
First, raked out the empty areas between the tiles and raked the rest of the grout areas to clean them.
Used vacuum to blow all the dust off of the counter and wiped down with a dry rag.
Then mixed the grout and water to be like a peanut butter consistency and used my hand and a plastic spoon to fill in the areas as needed. The associate at Lowe's suggested I get Keracolor U Unsanded Grout since the area will not be walked on.
The tiles in our home are laid very very close together so I tried various rakers, a box cutter, a grout tool shaped like a hook, but decided on the grout rake (there are no photos of me using it)
First, using box cutter I scrapped all the "food particles" that had accumulataed in the cracks with no grout.
Some "Before" photos are below. The Grout Rake was great in the wider grooves.
Honestly, when it was done.....it made the kitchen and bathrooms look like they were newly painted...just freshened up so nicely!
Photos are below.......
All done and so happy with the finished look!