In industrial applications, they are used as disposable plugs, but a longer use (14-21 days) is possible without further.
Daily cleaning is not absolutely necessary, if it does, then you should make sure to apply the cleaning solution (eg soap) only superficially and not to push in the plugs. This would reduce the ability of the plug to remain for a few seconds in the compressed state. By this way, dies as a stopper that he can no longer stay for a few seconds in the compressed state.
