When it comes to applying wall decals, achieving a smooth and lasting stick can make all the difference in your home décor. Firstly, ensure that the wall surface is clean and dry; give it a good wipe with a mild detergent solution to remove any dust or grease, and allow it to dry completely before proceeding. It’s advisable to use wall decals on flat, non-textured surfaces for the best adhesion.

Next, before removing the backing from the decal, position it on the wall without sticking to assess its placement. Once you're satisfied, carefully peel back a corner of the decal and press it against the wall, smoothing it down gradually to eliminate air bubbles. A credit card or a similar flat object can be helpful for this purpose, as it allows you to apply even pressure and ensures the decal adheres properly.

To further enhance the stickiness, you can apply a heat source, such as a hairdryer, on a low setting. This can be particularly effective for vinyl decals, as warmth allows the material to adhere better to the wall. Lastly, remember to avoid areas of high humidity or extreme temperature fluctuations, as these factors can compromise the integrity of your decal over time. With these tips, your wall decals should stick beautifully, adding a personal touch to your space.