These are among the easiest samples to study.  For this slide, I took a Q-tip/cotton bud and removed the cotton tip and swabbed my cheeks about 3-4 times gently. On a slide I put a drop of 1% Methylene Blue that I bought off the internet and mixed the end that I swabbed my cheek with in it a few times and added another drop of tap water.  I then placed a cover slip and taped the edges.

I readily saw a large number of cheek cells floating around and the contrast between the nucleus and cytoplasm got better over time (3-5 minutes).  Within the cytoplasm you see some granular material, perhaps rough endoplasmic reticulum.  I also saw some bacteria floating around that are not visible in these frames. The condenser/LED system is really extraordinary, and I am sure with time I can get professional quality pictures (Work in progress). Need to try other stains.

Manu, what would you recommend for cleaning the lens.