I don't know what you have tried so far...we take our 3 year old back to her room, give her a cuddle then leave, well DH does. If I do it, she crys because she knows mum is a soft touch. Sometimes she manages to sneak into the bed in the middle of the night without us knowing, so she does still sleep with us at times.

We have tried so many things over the last 6 months or so...we put a bed in our room and told her that she could sleep in that bed but not ours. That worked for awhile until she started getting up at 9:00pm wanting to go to her bed in our room. Then my DH slept on a mattress on her floor in her room for awhile. That worked for a short time, till she started hoping out of bed and crawling into the mattress on the floor.

So now when she comes into the room DH takes her back to her bed. Sometimes it can be 4 times a night.

Goodluck, i hope you find something that works.