Help with self soothing.... Pls

Brooke

My baby has been an excellent sleeper since day one. She is now 4.5 months old.

But....

She has always had a dummy and now has become so dependent on it to sleep when it falls out during the night she wakes then she can't get back to sleep without it..

I don't mind her having a dummy but she can't put it back in her self so it's becoming a big issues and could wake about 4 times a night. Where's as before she would sleep for 10 hours.

I really need some suggestions on how I can start putting her down without a dummy. Because atm she can't get to sleep without it.