A toothbrush is used to clean the welt of the boot (the area where the upper and the sole of the boot meets). Many boots have a particularly deep welt into which a general soap brush will not effectively reach. Saddle soap is applied to the brush (similarly to the standard soap brush) and the head of the brush is briskly scrubbed along the welt. The saddle soap is then removed. It may be necessary to rinse the toothbrush completely with water and use it to rinse the welt if the welt is too deep for a rag to effectively remove the soap. Some soles have texturing along the welt that requires water to be sprayed directly onto the welt to properly rinse the soap away.