This is rather a rookie mistake, although we can understand that you are so excited to start a new project that you simply delete the whole sheet without thinking about it. Removing the entire sheet exposes the adhesive and allows dust and dirt to adhere to it, reducing the likelihood of drills sticking. The adhesive will also begin to dry as soon as you expose it to air. This common mistake is a little more difficult to resolve once you've done it, but preventive measures are very simple.
You're probably about to reach the level of common knowledge in the diamond painting community, but it never hurts to repeat the basics. Yes, seal your diamond painting if you want it to look the same for a long time. Dust gets stuck in the gaps if you leave the paint unfinished. Diamond paints can be sealed with Mod Podge, acrylic fixative sealants and PVA glue.
Diamond painting is a relaxing and stress-relieving art, and it's always a shame when that sense of tranquility is heartrendingly interrupted by a sudden mistake. Fortunately, most of these are common mistakes in diamond painting, so the wider community of diamond painters has found some interesting solutions. As diamond painting pays a lot of attention to detail, it is important that you can see in detail. The nature of diamond painting makes it impossible to take pictures of real life beyond a certain threshold of detail.
Sometimes the cover sticks to the glue and it's hard to lift it up, so I use parchment paper, it works fine, thanks for the diamond painting. A very common mistake, especially when the DMC colors are too close to each other or the numbers on the grid of a diamond painting kit are too small. With so many diamond art tools, little rhinestones and all that adhesive on the canvas, it's more than understandable that things sometimes go wrong while you're working on the next diamond painting kit. It's also easier said than done to keep track of all your exercises if you have them scattered or if you tend to work in the living room or dining room rather than in a dedicated space for your diamond painting.
The best thing to do if you're starting to paint it with diamonds is to recognize for yourself that eventually there will be some kits that just don't work. Now that you've found your new obsession in the form of diamond art, the question of achieving that “perfect painting” remains. Many people prefer to frame their diamond paintings, keeping them intact, safe from dust and dirt and maintaining the brilliance of diamonds. In any case, since “being more attentive to your environment” is not a tip for diamond painting, we would like to focus more on some preventive measures and then talk about what to do when it's too late.
Normal Mod Podge, Super Thick Gloss Mod Podge and Glitter Mod Podge can be used to seal diamond paintings. It's definitely not one of the most serious mistakes in diamond painting, but it's still annoying and something to avoid.