The premise of making beautiful joints is that the tile gap is above1mm. If the tile gap width is too small, even if the beautiful joints are made, they will fall off. Because the gap of ceramic tile is small, the caulking agent can only hit the surface of ceramic tile seam, which will also cause later falling off.
If it is because the master's craftsmanship is not good, the gap size of the tiles is different. In this case, with the consent of the owner, you can use the cement cutting machine to cut the gap, but there is a certain risk of porcelain collapse, so you must be skilled.