Cracks in floor tile grout

[MKTEACH]

Just moved in house- 3 years old. Have noticed cracks in floor tile grout. Does anyone else have this problem and is there an easy way to fix this?

[mulligan]

Usually, grout cannot be repaired, only replaced. The easiest way is to remove the old grout, replace with as close a match as possible, then when cured, stain all the grout (new and old) with a stain/sealer.

[Rango]

MY house is 6 months old. I have grout cracks. Will be fix under warranty.
It is caused by the settlement of the foundation. In my previous house in TV, I had grout an tile cracks. (fixed under warranty) That's why the builder leaves extra tiles and grout.