How often
How often should you restock dishwasher tablets?
When the tub is low — typically every 4–8 weeks
Tablets are a usage cycle. Count the remaining tabs, or save the tub and mark replaced when a new one lands.
Signs it is worn out — save it nowSave one of these

Dishwasher tablets
Every month

Fairy Platinum Plus All In One Dishwasher Tablets, Lemon, 54 Tablets,…
Every month

Finish Dishwasher Tablet, Ultimate, 55 Tablets, Fresh Scent, Clean & …
Every month
Why replace it
An empty tub is how people run a hot empty wash with washing-up liquid. The reminder is the tub, not your memory.
Signs it is worn out
- Fewer than a week of tabs left
- You have already opened the spare
- Salt or rinse aid is also low — check those too
Source: Typical household interval. As an Amazon Associate I earn from qualifying purchases.
Also worth tracking
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- How often should you replace a fridge water filter?About every 6 months