Last week I detailed my car using Menzerna IP and FPII followed with Zaino. Well I think that the Z1 I used may have been older than three years. When I used the Z1 I noticed it seemed more like jelly than liquid and just thought that maybe it was because it has sat in the garage for a long time in the heat. Now after thinking about it I am fairly certain that the Z1 has gone bad. After the Z1 I applyed Z2, but I am concerned that the bad Z1 won't protect the paint and the work that I have done. I decided to go with a different sealer and need to know is there anything I can do to make sure that all of the Z1 and Z2 are removed before applying my new sealent without affecting the work that I did with the IP & FPII. Thanks!