Countertop or wall-mounted, which is better?

Wall-mounted holders score better in r/CleaningTips threads because residual water drains away from bristles instead of pooling at the base, which is the most-cited source of grime in countertop holders. The trade-off is adhesive longevity, multiple Reddit threads flag silicone and 3M-style adhesives failing after months to a few years, so wall-mount works best on smooth, non-porous tile or glass.