Disassembling a joint

After gluing a drawer with Titebond 2 I later discovered that one if the dado joins was not pushed in completely. The glue has already cured overnight. I have used PVA glues (Titebond and others) for heat activated veneering and wondered if I could soften up the glue enough to fix the joint. I placed the iron on it for a minute or so, but it did not work, dado was probably filled with glue and the tenon would not go in. Instead I noticed that the joint became wobbly as the glue started to soften. I was able to pull the joint apart without breaking anything, clean and redo it. This was on a relatively thin (12 mm) stock with flat surfaces which made for good contact and efficient heat transfer. The iron was set on "linen". Perhaps on larger joins steam setting or wet towel might help as stream is a good heat carrier.

I hope this information could be useful.