Currency investing

Salams

My question relates to investing & trading (swing & day) in currencies.

I’m aware CFD’s are not permissible as it’s a broker initiated product & has no underlying product (thus avoiding Trading 212)

But

Interactive brokers provides a 100% spot Account where your purchasing the underlying currency & not a derivative (margin & non margin accounts available).

My question relates to interest accumulation overnight.

I’m not aware of any method to hold a currency overnight without an interest transaction.

Thus

What should I do?
Should I purify myself by donating the interest I received (or donate the interest I’ve paid)

Any guidance much appreciated