Possible Clues:

• Hose
• River located round Home Counties or The Wash
• Word between "lather" and "repeat"
• Wash at the bottom right below river
• Get up about noon for a quick dip
• Clean mouth of river in Wexford area
• Teeth-cleaning step
• Wash out the lather
• You might be dyeing to get it
• Shampoo bottles' final dictum