My boyfriend and I bought a twinhouse and we're redoing the kitchen. We stripped the kitchen and dining room down to the studs. The flooring in the kitchen had three layers (go figure). After getting all the layers off, we find that the subfloor is uneven and lumpy because of leftover glue from the previous linoleum flooring. Any suggestions as to how to get that off or somehow be able to move forward with new flooring without it being subsequently lumpy and uneven?