Seder Hayom states that "one who fears for himself and for his soul should put great effort into this matter, namely to write the entire text of the Ketores (the composition of the incense) on kosher parchment in Ksav Ashuris (the script in which a sefer Torah is written), and he should read from this scroll daily, once in the morning and once in the evening with great concentration, and I guarantee [that this will help]."

Moreover, reading the ketores is a big help to return to Hashem, as the Gurei Ha-ari zt'l write:

Ketores is a Segulah (a remedy) to eliminate epidemics, to save Israel from oppression by the nations, to bring a. blessing into a person's work, to save him from the punishment of Gehinom, to ward off evil spirits, external forces, and "the other side" i.e. Satan's camp.

Reading of the ketores also breaks the spell of sorcery, eliminates evil thoughts, enables a person to inherit both worlds, this world and the world to come, to free him from punishments, to grant him favor in the eyes of all who see him, and to grant him riches. (Ein Ma'avar Yabbok)