next time you put them in use a bit of talc on them, will stop the moisture in the rose wood from gripping on to them so hard but will be enuf to keep the strings in.
i do this on all the acoustics i re-string. works a treat. however i would concider not using the brass ones as it may change the sound of your guitar too much, the transmition qualitys and the resonant frequencys will be totally different. up to you i guess.