Yes
Use a toilet snake
snake
to unstop condensate drain lines
Either plunge it or run a plumbers snake through to rid the blockage.
Some of the best rated toilet cleaners are Best Disposable Toilet Cleaner: Clorox Toilet Wand, Best Liquid Toilet Cleaner: Lysol Power Toilet Bowl Cleaner, Best Natural Toilet Cleaner: Seventh Generation Natural Toilet Cleaner.
Using a plunger is going to be much more effective.
The drain is getting plugged and the toilet is lower than the washing machine drain so it is easier for the water to come up in the toilet than to go straight out the drain. Put some drain cleaner down the drain where the washing machine drains and that may solve the problem.
You get lyrox cleaner!
The pH of toilet cleaners will vary greatly depending on what it is. Most toilet cleaners have a pH between 9 and 13, which is high.
Unfortunately it has been discontinued. I really liked the product. It's too bad. I just found it on "amazon" of all places! There were a few places. Google "Bam toilet cleaner" for more!
A sectional rodding machine is the best bet.
Toilet