After you have finished dusting the sewing machine, remove the throat plate & bobbin case. The lint build-up & other gunk accumulation is most common in the bobbin case & the area underneath the throat’s plate. Remove the bobbin case with a simple push. The throat plates in some sewing machines are closed with screws. Make sure you check your machine’s manual for guidance. Now to clean the bobbin case, remove it & then clean thoroughly. Don’t forget to dust the areas inside & in-between the feed dogs & the pressor foot. You can use an old cosmetic brush or even a nylon brush to clean these areas. Avoid using air blowers as they will spread the tiny lint particles & make the job messier.
The area beneath the throat’s plate is perhaps the dirtiest as it tends to be covered & often neglected. Therefore, make sure that you reach in between the nooks & crannies properly. If you find any dirt or gunk build-up, spray WD-40 Multi-use Product and use a cloth to clean the mess!