Ever wanted to get rid of extra XLM wallets without losing your reserved balance? You can do it.
First, remove all offers and trustlines from the account using StellarTerm. You'll need your secret key to log in there. Each trustline and exchange offer locks 0.5 XLM in addition to the default 1 to 1.5 XLM reserved minimum balance.
Once you've moved all assets and removed every offer and trustline, you're ready to use LOBSTR Merge Tool. There you'll enter the recipient address and MEMO (if required). In the next step, you'll provide your public key (sender address) and secret key to merge the balance into the recipient account. The merge costs 10% of your reserved balance (typically around 1 to 1.5 XLM).