Can’t see through it if it rains.

I have 2 problems with this decal. First, there was no adhesive on the bottom right hand side. I used a piece of the excess material cut from another part of the decal to stick it on the window. Second, I couldn’t see through the rear window at all when it rained. I contacted the supplier about the missing adhesive and he said he could send a replacement. However, I am worried about not being able to see out the back window when it rains. I am leaning toward returning the decal but I am not sure if I can get it off the window and back on the paper backing for a return.

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