How to clean a protein shaker properly

Updated 8 September 2026 · 8 min read · Fitzo

Most people clean the parts they can see and leave the parts that actually smell. Here's the full routine, from the ninety seconds after you finish drinking to rescuing a bottle that's already turned.

Cleaning a protein shaker isn't hard, but almost everyone does a version of it that leaves the worst part untouched. Below is the whole thing: what to do in the ninety seconds after you finish drinking, what a proper wash looks like, and what to do when a bottle has already turned.

The 90-second version, after every shake

This is the highest-value habit in the entire article. Wet residue rinses away with water and nothing else. Dried residue needs a soak. The difference between those two futures is about a minute and a half.

1. Fill the bottle about a third with water — warm if you have it.
2. Screw the lid on and shake it hard for ten seconds. You want water hitting the lid, not just swirling in the base.
3. Tip it out. Repeat once.
4. Leave the lid off and the bottle upside down until you can wash it properly.

Do that at the gym tap and a shaker will stay neutral for a remarkably long time. Skip it, and you're booking yourself a deep clean.

The full clean, step by step

1. Take it apart completely. Bottle, lid, gasket, blender ball or mixer grid, straw if it has one. Every one of these gets cleaned separately. This is the step that separates a clean shaker from a shaker that looks clean.
2. Rinse everything under warm running water to shift anything loose before soap goes anywhere near it.
3. Fill the bottle with hot water and a drop of dish soap. Hot from the tap, not boiling — boiling water warps lids and hazes plastic.
4. Drop the small parts in too. Gasket, blender ball, straw. They soak while you deal with the bottle.
5. Leave it for 15–30 minutes. This is not optional and it's not the same as scrubbing for longer. Protein film releases with time in contact with warm, soapy water.
6. Now agitate. Lid on, shake hard for twenty seconds so the soapy water works through the threads.
7. Brush the reachable surfaces — the inside wall and base. A soft bottle brush is fine; avoid anything abrasive.
8. Work on the gasket and threads by hand. Rub the gasket between your fingers under running water. Push a corner of a cloth into the lid threads and twist.
9. Rinse everything thoroughly. Soap residue tastes worse than you'd expect.
10. Air-dry every part separately, bottle upside down, lid apart from the gasket.

Taking the lid apart

If you take one thing from this page: pull the gasket out. That soft ring inside the lid is the single biggest source of shaker smell, and it sits in a channel that no rinse ever reaches.

Most gaskets prise out with a fingernail or the back of a spoon around the edge. It'll feel like you're breaking the lid — you aren't, that's just the fit. It pushes back in the same way when it's clean and dry, and you'll feel it seat.

While it's out, look at the channel it came from. That's usually where the smell has been living all along. We've written the whole thing up here: cleaning a shaker gasket and lid threads.

Deep-cleaning one that already smells

For a bottle that's already sour, pick one of these and give it real time. Each attacks the problem differently.

Two rules for all of them. Soak upside down where you can, so the solution sits against the lid rather than the base — the lid is the dirty end. And if the smell survives a proper soak that reached every part, the gasket is likely degraded rather than dirty, and wants replacing.

Is the dishwasher enough?

It's a good tool with one specific blind spot. It's hotter than your hands can stand, which genuinely helps, and it needs no effort. But it cleans by spraying water, so it only cleans what the spray reaches. A lid that goes in screwed together comes out with dirty threads.

To use it properly: disassemble everything, put the gasket, blender ball and any small parts in a closed cutlery basket so they don't get flung around, and keep anything not marked dishwasher-safe on the top rack away from the heating element. Check your bottle's markings — a lot of shaker lids aren't dishwasher-safe even when the bottle is.

Drying, which is half the job

A clean wet shaker becomes a smelly shaker. Bacteria need moisture; take the moisture away and the cycle stops.

• Dry every part separately. A lid drying while screwed onto a bottle isn't drying.
• Bottle upside down on a rack so water runs out rather than pooling in the base.
• Gasket out of the lid until both are bone dry.
• An hour in sunlight after washing does more than it sounds like it should.
• Only assemble it when everything is completely dry, and store it assembled but not sealed — or just store the parts apart.

Plastic, stainless steel and glass

Plastic is the most smell-prone. It's slightly porous, it scratches, and scratches hold residue. Be gentle with it and never use abrasives.

Stainless steel holds odour far less and tolerates hot water and long soaks well. It still has the same lid and gasket problem — the seal is where smell lives regardless of what the bottle is made of.

Glass is the most inert and easiest to get properly clean, and the least practical in a gym bag.

In every case the gasket is silicone or rubber, and in every case it's the part that needs the attention.

A realistic weekly routine

If that feels like a lot for a bottle, that's fair — it's precisely why we're building a tablet that replaces the middle two rows.

Still confused about why it happens at all? Start here: why does my protein shaker smell?