I used the highest quality clear silicone over some cracks that had developed in the lower floor edges of my bath shower tile because the grout is a specific color that couldn't be matched. But almost immediately the clear grout changed back to white. Is this a weird chemical reaction? How do I remove the now-white silicone? And can anyone suggest a clear silicone product that actually stays clear. It sickens me to see these random white lines on otherwise nice looking tile. Thanks for any suggestions. Jim