If you only want to consolidate cheaply, await a low mempool fee rate, and send all your Bitcoin to yourself in a single transaction.
Or the more complex way, you can use ‘coin control/UTXO selection’ to pick which ones to consolidate - e.g. all less than 0.0001B. Basically any that are smaller than the smallest transaction size you perform - aiming to only require a single UTXO as a transaction input instead of multiple.
