my garlic powder and other herbs powder i use for seasoning, after 1-2 months. it becomes harden and clump together like a mini rock rather than the powdery form when i bought it

why is it happening? is it because of moisture? how to prevent it?

i asked my fren who is a chef, he said he doesnt know and his powder is used up before 1 month.

kept my garlic powder in the fridge ever since. no more clumping up

Moisture.

Either put in refrigerator or in a container with food safe moisture absorber.

do you shake your seasoning directly over cooking food?

I do the same 👍

put some food grade silica gel packet in the container.

This is one of the cause

Hot steam rise on top and if you shake it on hot food moister gets into it

I put mine in the fridge solve the problem. Used to use chopstick and korek until I found a TikTok video on this

Kena air

The same happens to Milo, Horlicks, instant coffee powder, etc. As mentioned by some people here, store in fridge.

Moisture

you can put dehumidifier inside your cabinet

should help

Fridge la

Put it in the fridge.

Humidity. Our tropical weather humidity > 70%

Just keep it in fridge. If worry about other food absorbing the smell, put it in a seal container in the fridge.