Very poor sci-fi flavoured joke (clean)

I bought some shower gel, right, and on the outside, it says that its Regenerating Shower Gel.

But Ive nearly reached the end of the tube, and it doesnt seem to be filling itself up again.

Should I take it back and complain?

[A ha ha ha ha ha ha ha. A ha ha ha. Hahahahaha. Im really sorry, I thought of that in the shower at the gym, and it made me laugh, and if I dont write it down somewhere then Im just that weird woman that laughs in the shower cubicles for no apparent reason. Sorry.]