Using incense in the Masjid

Q 2: I enclosed two kinds of scent in this letter. Please advise if it is permissible to use them inside Masjids (mosques), because some people dislike using these two kinds and some have stopped scenting the Masjids with them because they consider them Makruh (disliked). (Part No. 24; Page No. 109

A: If their ingredients do not include unlawful substances, it is permissible to use such scents; otherwise they are not permissible. However, if it is difficult to know their ingredients, the basic rule is that they are Tahir (ritually pure) and permissible unless there is evidence to the contrary.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.