Air bubbles can occur under Frosting Sheets due to several reasons. Here are a few common causes and potential solutions that can help you get to the bottom of your bubbling issue:

Trapped air during application

Air bubbles may form when Frosting Sheets are not properly applied to a cake or surface. If the sheet is not smoothed out carefully, air can become trapped beneath it. To solve this issue, you can try the following steps:

1. Ensure that the surface of the cake is clean and not too moist before applying the Frosting Sheet.
2. Gently lay the sheet onto the cake and avoid pressing it down forcefully.
3. Smooth out the sheet slowly and evenly using your hands or a smoothing tool, starting from the center and working your way outwards to eliminate any trapped air.

Moisture content

Excessive moisture on the cake or the Frosting Sheet itself can lead to the formation of air bubbles. If the cake has not completely cooled or if condensation forms on the sheet, it can create air pockets. To mitigate this issue, you can try:

1. Allow the cake to cool completely before applying the Frosting Sheet.
2. If condensation forms on the sheet, gently blot it with a clean, dry paper towel before applying it to the cake.
3. If you're applying your sheet to a buttercream cake and are familiar with using fondant, go ahead and roll your image on a thin piece of fondant before applying it to you buttercream cake. The fondant will support the sheet and act as a wall between the buttercream and the image. Use a bit of water, corn syrup or vodka to adhere the sheet to the fondant.

Improper storage

Incorrect storage conditions can affect the quality of our Frosting Sheets and contribute to the formation of air bubbles. Moisture and temperature fluctuations can impact the sheet's structure. Here are some storage guidelines to follow:

1. Store the Frosting Sheets in a cool, dry place, away from direct sunlight and humidity.
2. Seal the sheets in the zip lock bag it comes with and push out the extra air inside to prevent exposure to moisture.
3. Avoid refrigerating / freezing Frosting sheets as this can introduce condensation as it cools down.