Are Loofahs Hygienic? How a Natural Loofah Should Be Dried, Used and Replaced

Hygiene is the first objection buyers raise about loofah, and it usually comes from a dermatologist quote they read online. The quote is generally accurate. What it leaves out is that most of the risk is controllable, partly by the customer and partly by the manufacturer. This guide covers both sides, including moisture readings from our own production.

Why loofahs can hold bacteria

A loofah is a dense web of plant fibre with many small cavities. In the shower, those cavities fill with water, soap and the dead skin the loofah has just removed. If the loofah then hangs in a steamy bathroom, it never fully dries. Warm, wet, and supplied with organic matter is the combination bacteria need.

Cleveland Clinic dermatologist Dr. Melissa Piliang describes it plainly: loofahs are used in a wet environment and hung in a wet environment, so they do not dry out, which makes them a good place for bacteria to grow. Cleveland Clinic lists E. coli, Pseudomonas aeruginosa, Staphylococcus and Streptococcus as organisms of concern, along with fungi.

What the research found

The study most often cited is Bottone and colleagues, "Loofah sponges as reservoirs and vehicles in the transmission of potentially pathogenic bacterial species to human skin", Journal of Clinical Microbiology, February 1994. It started with a patient case: a skin infection (Pseudomonas folliculitis) traced back to a contaminated loofah.

The researchers then tested loofah pieces and found they supported gram-negative bacteria such as Pseudomonas, Xanthomonas and Klebsiella, and gram-positive species including Enterococcus and group B Streptococcus. Two details are useful for anyone selling the product:

• New, unused loofahs started with sparse, mostly harmless flora. Once hydrated, the flora shifted toward gram-negative bacteria. In other words, keeping the loofah wet changed what grew on it.
• Growth increased when dead skin cells built up in the fibre. Rinsing matters, not just drying.

The authors recommended decontaminating loofahs with diluted hypochlorite bleach at regular intervals. That study is more than thirty years old and was a lab and case investigation, not a population study. It is still the best-known evidence, and it is consistent with current clinical advice.

Hygiene starts before the loofah reaches the shower

Customers can only control what happens after they open the package. What happens before is the manufacturer's job, and the main risk is moisture. Loofah packed while damp can arrive with a sour smell or dark spots after weeks in a sea container, before anyone has used it.

Our limit is 12% moisture or below at packing. We check finished pieces with a handheld MD916plus digital moisture meter. Here are eleven readings from one recent check, taken on finished teardrop, oval and rectangular pieces just before packing:

The readings ran from 9.5% to 10.5%, with an average of 10.05%. One caution on method: handheld meters of this kind are built mainly for wood and building materials, so we treat the number as a screening check against our limit rather than a laboratory measurement. A piece that reads high is set aside and dried again. If you need a lab moisture test for a specific order, we can arrange one.

Two other production steps affect hygiene. We whiten with steam only, no chlorine, and every batch is visually checked for mould before packing. You can read more on the quality and process page.

How to dry a loofah after each use

Drying is the single habit that changes the outcome most. These steps are what we print on our care cards.

1. Rinse out the soap. Hold the loofah under running water and squeeze it several times. Done when: the water runs clear and no lather comes out.
2. Squeeze out the water. Press it flat between your palms; do not wring and twist a flat pad. Done when: it stops dripping.
3. Shake it. A few hard shakes clear water from the inner cavities. Done when: it feels damp, not wet.
4. Hang it outside the shower. Use the loop on a hook where air moves, ideally outside the bathroom or by an open window. Done when: it is dry and stiff to the touch before the next use.

Note: do not leave a loofah in a shower caddy or on a soap dish where water collects under it. That is the setup most likely to produce a smell within a week.

How to clean and sanitize a loofah

Cleveland Clinic suggests a weekly clean, and the 1994 study authors recommended periodic bleach decontamination. Either of these methods works for loofah that has no metal or wooden parts.

1. Diluted bleach soak, weekly. Soak the loofah for about five minutes in a diluted household bleach solution, following the bleach label for dilution, then rinse thoroughly and dry. Done when: no bleach smell remains after rinsing.
2. Dishwasher, as an alternative. Place it on the top rack of a normal cycle. Done when: it comes out clean; dry it fully before use.

Note: we do not recommend microwaving a loofah. Advice to do this circulates online, but dry plant fibre can scorch, and pieces with wooden handles should never go in a microwave.

When to replace a loofah

A used bath loofah does not have to go in the bin. Cut it up and move it to cleaning jobs such as sinks and garden pots, then compost it. See how to compost a loofah.

Loofah, silicone or washcloth: which is more hygienic?

Silicone brands often market their scrubbers against loofah on hygiene, and they have a point. Silicone is non-porous, so it does not trap skin cells the way fibre does. The trade-off is material: silicone is a synthetic polymer and will not compost.

A care card retailers can print

Many negative reviews about smell come from customers who were never told how to dry a loofah. A small insert card fixes most of that. You are welcome to use this text on your own packaging:

If you are building a private label bath range and want this printed on your inserts, ask for a sample kit and we will include a card mockup. Relevant products: loofah bath glove, oval exfoliating scrubber and droplet bath sponge. For the material itself, see the natural loofah guide.

Frequently asked questions

Sources

• Bottone et al., Loofah sponges as reservoirs and vehicles…, J Clin Microbiol 1994 (PubMed)
• Cleveland Clinic – Why loofahs can be bad and alternatives to try

Last updated 2026-09-09. Figures from third-party studies are quoted as published; we have not re-analysed their data.