Why can compostable bin bags leak?
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Reggie
Fit first. Liquids next.
18 May 2026
The short answer
Compostable bin bags usually leak for boring reasons: wrong fit, too much liquid, sharp scraps, overfilling, old storage, or being left too long.
16:02That is good news. Boring reasons usually have boring fixes.
16:03The first leak test is not the bag. It is the routine around the bag.
The six usual suspects
One: wrong size. If the liner is too small, it stretches over the caddy rim and weak spots appear before anything messy has even happened.
16:08Two: too much free liquid. Tea, coffee, soup and wet peelings add up. Drain scraps where you can before they go in.
16:09Three: sharp scraps. Eggshells, bones, woody stems and hard packaging corners can poke holes if they land point-first.
16:10Four: overfilling. A food caddy liner is not a strongman contest. Leave enough bag to tie it without wrestling it.
16:11Five: storage. Keep rolls cool, dry and out of strong sunlight. A kitchen windowsill is not a spa day for compostable film.
16:12Six: time. Wet food waste gets heavier and smellier as it waits. Empty the caddy before the bag becomes the whole plan.
16:13What to fix first
Start with size. A liner that fits well does less stretching, less slipping and less dramatic kitchen theatre.
16:18Then fix moisture. Councils often ask households to keep food-waste caddies free of unnecessary liquid and contamination.
16:19If the routine is good and leaks still happen, change the liner. Life is too short for caddy soup.
16:20Where Generation earth fits
Pick by caddy size first. Use the council bin checker, then choose from the Generation earth liner range.
16:26Sources and proof
References used for the caddy-routine guidance in this Field Note:
