If your speaker has those red and black cables that connect it to the back of a sound system, then press down the levers where they are connected and pull the wires out.
Some grills may be connected with screws, in which case you will need to remove them with a screwdriver.
Make sure to use a can of air that specifically says it is for cleaning electronics. Don’t hold the can upside down or sideways, or chemicals can spray out and get into your speaker.
Make sure that if you use a makeup brush it is clean and has not been used for makeup!
If the cloth is dripping, then it is too wet. Wring out all the excess water until it is just barely damp.
Speaker cones can be very delicate, so be careful to apply just enough pressure to wipe away any dust and dirt, or you might indent the speaker cone.
Make sure to use a microfiber cloth. Regular fabrics will just leave lint behind on the speaker. If you don’t have a second microfiber cloth, then just let the speaker air dry.
Depending how big the speaker grill is, or how dirty it is, you may need to use more fresh adhesive layers of the lint roller. Peel off the dirty adhesive if it seems like it isn’t picking up any more dust.
You can get wet wipes for cleaning electronics at an electronics shop, or special dusting wipes in the cleaning aisle of a supermarket.
Don’t use water or liquid cleaning products to clean out your smartphone’s speaker or you could damage the speaker. Don’t use compressed air because the pressure could be too strong and damage your smartphone.
Don’t use household cleaners, compressed air, or any kind of spray cleaner to clean smart speakers.
Some laptops may require you to unscrew the outer case to expose the speakers.