Text: wpa personalselect this option if the wireless network requires a wpa pre-shared key.

Correct capitalization: WPA PersonalSelect this option if the wireless network requires a WPA pre-shared key.

Text: these cookies are used to show you adverts that are relevant to you on other websites that you may visit.

Correct capitalization: These cookies are used to show you adverts that are relevant to you on other websites that you may visit.

Text: wifi is available in the business centre and is free of charge.

Correct capitalization: WiFi is available in the business centre and is free of charge.

Text: wash your dishcloths with cold water and detergent; the combination will clean and kill germs sufficiently.

Correct capitalization:
Wash your dishcloths with cold water and detergent; the combination will clean and kill germs sufficiently.