you could always just boil them for 10-15 seconds in a pot of water the only problem is you have to find a way to make them keep their shape while your doing this. you can do it by wrapping it with thin wire or string though or anything really just as long as the shape holds. Another thing to do is to wrap a wet rag around the dread and press a flat iron down on the rag for about 20 seconds or so depending on the thickness of the dread. These methods leave the dreads slightly damp though and you have to lay them out and wait for them to dry.
Edit: when making dreads make sure you don’t use PP or polypropylene fibre which is really cheap synthetic hair it doesn’t heat seal. Kanekalon is really good for beginners it seals fairly easily.
