We all know this when using fusible web: too much heat from the iron for too long will kill fusible web on fabric. Repeated exposure to a hot iron actually burns the glue into the fabric. The fabric shapes get stiff and soon pop off like a rubber band in flight.
Don’t do it!
Instead use a technique called “fuse tacking” when adding fused shapes to your background fabric. Fuse tacking is exposing the glue to a little heat from the iron for a short amount of time, about 3 seconds.
Also, cover your design with silicone release paper or parchment paper when fuse tacking. This protects your iron and keeps shapes place upside down from sticking to the iron. (Here are more tips on fusing .)
However, I do give you permission to kill glue on your ironing board. The glue loves the iron and wants to melt all over it. If you get fusible web on your ironing surface, the iron will melt it and put it on your beautiful quilt top.
Here’s how to kill your glue: Place silicone release paper or parchment paper on the offending splotch of glue. Use a hot iron and iron the glue through the paper a good 20 – 30 seconds. This will melt the glue into the ironing board fabric and it will no longer be attracted to your hot iron.