I’ve tried everything - first hot water, then boiling water (which slightly warped the plastic, but it sounds ok), then freezing, then immediately into hot water, but the sucker will not budge. Any suggestions?
I’m stumped, I don’t even think Sweetones use glue on the joint so it must be pressure fitted pretty tight. Hopefully another lesson learned about using boiled water though.
Good luck.
I’ve often wondered if the body of a Sweetone is cylindrical or conical under the plastic head piece. The rest of the body is conical, so maybe it’s tapered under the plastic, too. If it is, that could make it hard to remove the head piece. (I wonder, too, how they get the head on the body?)
Maybe someone will have taken one apart and can tell us.
I have taken apart several and they were all very easy. I used no water, hot or otherwise, all it took was a good tug because they didn’t even have glue under there.
That’s interesting. Is the metal body conical (tapered) under the head?
No. They swaged the the sides parallel for about an inch.
I’ve taken the head off my Sweetone, and both of my girls’ Megs and they came off easily with no hot water or anything - just pulled them right off.
Jason
No it´s not! It´s straight!
Thanks for the answers.
Once you pull the head off, what do you do to tweak the whistle?
In my experience, not too much for a Sweetone. Just put a little bit of poster putty in the little hole below the windway and make it smooth. Just be careful putting it back on, my only Sweetone got stuck in the process and now the head is all crooked off to the side.
Did the putty help the sound much?
With luck, that offset might make it easier to hold the whistle if you play it from the side of your mouth!
Haha, you never know, I’ll give it a try. The poster putty helped a bit, I think it’s more helpful on Generation types that are more raspy. Sweetone’s usually seem pretty solid across both octaves without tweaking. It’s all personal preference.
Bandsaw?
Dave
Don’t worry about taking the head off. Just get the body off.
This raises a question: I have an old E Shaw that I use when I’m jamming with my 10 year old nephew, who’s learning fiddle. It’s way too soft and breathy and I’ve never really liked it. Do those of you who routinely take whistles apart think I would have a chance of grafting a sweetone head onto a decapitated Shaw body?
That sounds like a lot of trouble. You can get a susato or dixon in E for not too much dough. Or make your own tube and stick a head on it.
Ack! You do that with a hack saw?
I wouldn’t.
You’ be better off tweeking it like you would a Clarke and there are a few other things you could do before putting it to the guillotine.
JMHO.
But hey… there are times we must sacrifice for science. 
I used hot water and it destroyed a Sweetone D. Bent it out of shape. Ain’t doing it again. Fortunately, I have three more. I bought four Sweetones and two of them are as sharp as any pro whistle. I bought several other types, Generations, Oak, Waltons mellow D, and etc, and they rattle, and squeak. The Generation’s so bad that it causes my upper lip to itch.
I have a tweaked Shaw Bb. It’s breathy and hard to make high B, but I love it with slow airs.
To be fair to the Shaw, it IS sweet on slow aires, (and then I usually grab my favorite Clarke D for those,) but it’s just not up to trading Devil’s Dream solos with a beginning fiddle player! My Sweetone D is perfect in G or D but doesn’t cover A or E, and I have wished for an E sweetone more times than I can count.
Is making a new tube really easier than what I am considering? What I was thinking was to hacksaw the shaw to match length from fipple, file and swedge as necessary, then grease the inside of the sweetone head, insert tube and pour epoxy resin to form a smooth collar.
I have never gotten comfortable with my Susato D (probably my fault, not its) so I havent tried their E.
hint ..
dont try to twist off the head of a sweetone or a meg…
It just wont work without damage.
simply …a direct pull is all that is necessary.
the folding of the metal on the underside of the whistle prevents it from being twisted.
see if that makes a difference 
David