<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Hi Nadav,</div><div class=""><br class=""></div><div class="">If the holder is too warm due bad clip-ring clamping, things are too warm, but I would then expect a time dependence, first you get “leopard pattern” which then migrates into cubic spots. Are the spots cubic? This process always happens but it is faster when too warm, here’s an example of a badly clipped Polara cartridge after one night in the column:</div><div class=""><br class=""></div><div class=""></div></body></html>