Not new to photography but having a problem

I have just began 10x8 photography purely for contact printing.

Having trouble with drying marks on the neg.

I use adox wetting agent and hang corner down but still getting drying marks on negative.

I am using tap water for final wash in wetting agent, is this the problem.

I had no problem with 5x4 or 5x7 negatives

or do I need to squeegee of some sort.