Is it permissible for a fasting person to rinse the nose and mouth during the daytime in Ramadan?

The Messenger of Allah, peace and blessings be upon him, commanded the thorough performance of ablution (isbagh al-wudu') and exaggeration in sniffing water into the nose (istingshaq), except for the fasting person. This indicates that a fasting person should rinse his mouth (madmadah) and sniff water into his nose, but without exaggeration, fearing that water might reach his throat. Therefore, rinsing the mouth and sniffing water into the nose are obligatory in ablution and ghusl (definition) for both the fasting and non-fasting person.