What’s the smallest recurring expense that quietly drained the most money from you?

I’m launching FloosYo tomorrow, and this is the question that pushed me to build it:

What are the small recurring expenses we stop noticing, but keep paying for every month?

Not the big obvious bills. The smaller ones.

The app subscription you forgot about.

The delivery habit that became normal.

The cloud storage renewal.

The gym membership you barely use.

The “only $9/month” thing that quietly becomes $108/year.

FloosYo is built around this idea: make those money leaks visible before they drain your wallet.

Curious to hear from others here:

What’s one recurring expense you forgot about, underestimated, or only noticed much later?