If one toiveled an item that really required a bracha without a bracha and then used it is it necessary to go back and retoivel with a bracha again?
Answer:
No. Like all mitzvos, even though a berachah was not made, the tevillah is fine, and there is no need to repeat it.
In fact, repeating it is superfluous, and if repeated a berachah could not be made, because the original tevillah was effective.
Best wishes.
