SANDRA and Scent: What Stays on the Surface

By GETAUVE Editorial Team · Published October 26, 2026

SANDRA and Scent: What Stays on the Surface

Two weeks in, the joint between the zones smells like the drawer, not the device.

A dual-zone body has more places for residue to sit than a one-piece one. Here's where scent collects, what removes it, and when cleaning stops helping.

The Short Answer

Wash with warm water and a drop of unscented mild soap, rinse until the water stops feeling slippery, and dry the joint completely before storage. Most lingering smell comes from residue trapped at the seam between zones or from a damp drawer, not from the silicone itself. A 30-second wash handles the surface, but the joint needs a little more attention than the rest of the body.

Where Odor Collects on a Two-Zone Body

Silicone is slightly porous at the surface and oleophilic, which means it attracts oils. That's why it feels skin-like, and it's also why it holds onto anything oily that touches it.

On a single-piece device, the vulnerable areas are the button recess and the charging port. On a dual-zone body, add the joint.

The joint is a transition between two rigid sections, and transitions collect. Residue, moisture, and whatever the device was resting on all end up in the same narrow band.

There's a second area worth checking: the seam around the control panel. It's shallow enough to look sealed and deep enough to hold a film.

The Joint Is the Problem

A 7-inch dual-zone device has to flex or align at the joint, which means the seal there is doing more work than the seal anywhere else.

That has two consequences: residue accumulates there faster, and you shouldn't be aggressive about cleaning a seal under mechanical stress. The downside is that the gentle method needs doing more often.

So the method is gentle and repeated rather than thorough and occasional. A soft cloth, warm water, and a fingertip along the seam once a week does more than a deep clean once a month.

Don't use a brush. A brush pushes residue deeper into the seam instead of lifting it out, and an abrasive brush can abrade the silicone at exactly the point where it's thinnest.

Cleaning Without Soaking

IPX7 means the device can survive immersion, but surviving isn't the same as benefiting. Soaking a dual-zone body gives water more time to work into the joint, and the joint is the part you can't easily dry.

So clean it the way you'd clean something you can't take apart. Wet cloth, mild soap, short contact time, thorough rinse.

• Warm water, not hot.
• Unscented soap, one drop.
• Thirty seconds of wiping, with extra attention at the joint.
• Rinse until the water runs clear and stops feeling slick.

Say you wash it at the bathroom sink before bed with the nice hand soap. Scented soap is the most common cause of a smell that won't go away. You clean the device, and you leave a fragrance layer that the silicone then holds. If the smell started after you switched hand soaps, that's the answer.

Alcohol works on oil but dries silicone, leaving it tacky and more likely to hold residue. Occasional use is fine.

Drying a Two-Motor Shell

Drying is where dual-zone devices take longer than single-zone ones, because there are more places for water to sit. The catch is that a quick towel-off leaves the joint damp while the rest of the body feels dry.

Shake off the excess, set it on a clean towel, and give it 20 minutes in open air. Don't put it in a drawer damp because you're in a hurry.

Blot the joint rather than wiping it. A wiping motion pushes water along the seam; a blotting motion lifts it away.

Press each control once while drying, then blot again. That works moisture out of the button gaps, which is where a musty smell usually starts.

The charging port is the exception to everything. Don't probe it, don't press it, don't charge until you're certain it's dry.

When Cleaning Stops Working

If a smell survives two washes and a full day of air drying, the residue has likely moved into the surface layer, and soap won't pull it out.

At that point the options are limited. Store it with an unscented desiccant packet to keep it from getting worse, or replace it. Silicone won't come back from a deep clean the way glass would.

Distinguish a smell from a texture change. If the surface feels tacky or chalky, the material itself has changed, and that's a replacement signal rather than a cleaning problem.

The other signals are runtime and sealing. If a device that used to run near 90 minutes now gives you 45, or if water gets past the joint after a rinse, the shell is no longer doing its job regardless of how it smells.

And if the joint has become stiff or loose, that's mechanical wear rather than residue. Cleaning won't restore alignment, and alignment is the reason to own a dual-zone device at all.

Who Should Skip the Deep Clean

If the smell came from a scented product you use daily, changing where you store the device will do more than any cleaning method, so skip the soak entirely. If the shell is tacky or the joint is loose, don't bother cleaning it, because the material has already changed. And if you want a device with no seam to worry about, a one-piece body is the simpler answer, though it still needs the weekly wipe.

Sources

• Cleveland Clinic — general information on skin-safe cleansers and irritant contact dermatitis.
• International Electrotechnical Commission — IPX7 ingress protection definitions.
• Consumer Product Safety Commission — guidance on cleaning and storing battery-powered devices.

This is general education about material care, not medical advice. If you notice irritation, stop using the device and speak with a clinician.