Settle by date which of four drains has gone longest
Drain smells usually surface first in the one nobody thinks about rather than the one in daily use. Enter the last cleaning date for the kitchen sink, bathroom basin, shower drain and laundry drain along with the interval you have set, and the page lists days elapsed and the next date for each, then names the drain that has gone longest. There is no need to fill in all four.
How the numbers are worked out
Days elapsed is the calendar difference between the last cleaning date and today, and the next date is that date plus your interval in whole days. Because real dates are advanced rather than milliseconds, month ends and leap days carry over correctly. No officially recommended interval is offered: what circulates depends on usage and plumbing and is common practice rather than a standard. As of October 2026, the interval is yours to set.
Ratios for household ingredients such as baking soda and vinegar, cleaner types and how to open a trap are not covered here. For directions and precautions, follow the product label and the manufacturer's instructions.
Frequently Asked Questions
No officially recommended interval is offered here. What gets passed around depends on how heavily a drain is used and how it is plumbed, so it is common practice rather than a standard. Enter an interval you can keep and the page works only from that.
It is simply the location with the most days between its last cleaning date and today. When several have passed their interval, the one with the largest elapsed count is named first.
No. Only locations with a date are calculated, and blank rows are listed as not entered. A date later than today is flagged rather than calculated.