After gently squishing the squishies that I've had for 3 weeks, I started noticing cracks/defects along the creases and next to the sealant on the creases. I managed to fix the cracks and defects by using Jones Tones Plexi Glue that calisthenics use to attach applique, trims, beads, etc to their stretchy costumes. I am not sure if any other fabric glue are ok to use.
Plexi Glue pic sourced from https://au.pinterest.com/pin/130885932894977906/
I got the hang version :)
I hope this will help the squishy obssessed save their (favourite) squishies!