When you take the flexible foam removal as you can as much as yours., remove as remainder using an oil based cleaner such as “Goo Gone” or “Goo Off”: these cleaners are designed to broke the bond of the VHB adhesive.
When you have removed as much of the flexible foam as you can, the remainder can be removed using a citrus oil based cleaner, such as “Goo Gone” or “Goof Off”. These cleaners are designed to break the bond of the VHB adhesive.