Tumbling process stuck with coinjoin fee to low

[lacksfish]

5/10 txs in i get this

...
[2015/10/29 17:51:47] cj amount = 517789
[2015/10/29 17:51:47] rel/abs average fee = 0.0194780113135 / 10085.5
[2015/10/29 17:51:47] cj fee higher than maxcjfee, waiting 60 seconds
[2015/10/29 17:52:47] choosing sweep orders for total_input_value = 537960
...

and it keeps repeating

Fallback proposal:

If the maxcjfee is insufficient X times in a row, prompt the user to increase it