I have never pre-shrunk batting before using it in a quilt. From everything I have read there is so little shrinkage that it is non-negotiable.

Maybe fill your sprayer with hot water, to help increase the shrinkage possibility?

As part of your experiment ...
what about the hot water spray treatment and then tossing some into the dryer?

Look forward to hearing your reports of your experiment!

It depends on what batting you use. I'm using Warm & White and it does shrink quite a bit.
I usually measure my quilts before and after wash so I know.

OK. Will give this a try. I'll let you know how it turns out.
I think I need one of those spray for fertilizer. Last time I did this
to remove wrinkles on a batting, my hands sure got a work out.

I agree, doing a lot of hand spraying is generally not kind to our paws!
Good Luck!

hhmmmmmm ... by chance do you have a sprayer on your sink nozzle?
A quick shower there, and then lay flat to dry elsewhere?
That'd be EasyPeezy'er than hand spraying! :D

I can just imagine bringing my batting in the kitchen.
We will be eating fuzzies for days. :D

Oh you'll be fine ... a quick shower and then off to somewhere else to dry!

I checked...one gallon sprayer costs $16. I think I can live with that. :)
I will probably get some funny looks...like why are you buying a sprayer in
September? Keeps people entertained. :D

Before you buy .... have you used one?
I have one about that size, and it takes a lot of oomph to make it work.
Different than the hand spritzer, but still not that nice to work with.

And now you have me wondering just how much batting you are wanting to spray down
that you are buying a full-on sprayer! :D

Well, I have a plan. I'll ask DH to help. Pretend you're spraying the lawn. :D
The quilt is about 90" square.