The Smell in my Bathroom

For the last few days, I have noticed this smell in my bathroom. I couldn't seem to place it.  I had cleaned the toilet. Taken out the trash.  Washed the tub/shower.  Cleaned the sink.  Mopped the floor.  But for some reason, the smell still lingered.  I checked in cabinets, behind organizers, and underneath the sink...but nothing seemed to be the source of the smell.

This morning as I was having my quiet time, my husband came out of the bathroom with two of the baskets that I use to hold our hairbrushes, hair dryer and straightener.  From a distance and in the dim morning light, I thought I saw shaving cream on them.  But upon a closer inspection this is what I saw.

Can you see it?  It's fuzzy, white and green... It's mold.  Disgusting!  No wonder my allergies have been flaring up lately.  I need to tell my pre-teen and teenage daughters to not take such long hot showers in my bathroom. I have since throughly scrubbed the bathroom again and washed the floor mat, just in case that was a secondary cause of the foul odor in my bathroom.  Hopefully tomorrow, it will smell fresh and clean!