More examples

From what I've heard, the school toilets are not exactly as hygienic as they should be.

Food must be prepared and stored in hygienic conditions.

You can't eat food that's been on the floor - you know it's not hygienic.

It is essential that doctors follow strict hygienic practices like washing their hands after examining every patient.

I suppose warm-air hand-driers are more hygienic than hand-towels, and paper towels create a lot of litter.