The keyboard has been used for 1.5 years, but I don't have time to use my computer. WARNING! Since cleaning the keyboard a few days ago, the CTRL, ALT, WIN, ALT SPACE, FN, and NOTE keys are not working. There is no service center near us, so I haven't been able to get it serviced. Whoever takes it will need to get it serviced. If it doesn't work after servicing, there is an option to return it. Thank you. WhatsApp/Personal.