Some folks have installed a new curtain track that is much wider to give more room in the shower.
A related mod I've heard of is to cut a hula hoop down to some amount wider than the shower and to put t-connectors on both ends. The hoop is bent a bit and the t-connectors are fitted against the wall. It's springy enough to keep itself in place and the arch pushes the curtain away from you while showering. No need to replace the original shower rod.
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