Glamourous White Toothpaste from Watsons Causing Sticky Residue in Mouth

I purchased two discounted Glamourous White toothpastes from Watsons, but after using them, I noticed a sticky residue forming in my mouth throughout the day and night. When I switched to another brand of toothpaste, the issue disappeared completely. This leads me to believe that either the toothpaste I bought was expired or there is a problem with the Oral-B toothpaste itself. I expect Watsons to investigate this matter and provide a resolution. This has been a frustrating experience, and I request that the issue be addressed immediately.