This is very good idea.
Alternatively we can ask the food vendors to do big cleaning at different Sundays as they take turn stop selling on Sundays.
The canteen committee just did a monthly inspection on Wednesday and can see certain improvement in term of housekeeping. However, big cleaning is still needed.
Number of cockroach found in trap houses has also significantly reduced from more around 1,000 to less than 100 (more than 90% reduction).