^^^ Good point. They should adopt new technology and start to maintain new procedure for cleanliness.
As you would find out Fakruddin & Sons the Biriyani maker, they have adopted new standard and much more healthy way of cooking.
﴾اَلَاۤ اِنَّ اَوۡلِيَآءَ اللّٰهِ لَا خَوۡفٌ عَلَيۡهِمۡ وَلَا هُمۡ يَحۡزَنُوۡنَ ۖ ۚ ﴿۶۲
"Listen, the friends of Allah shall have no fear, nor shall they grieve" (Yunus: 62)